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configure.ac
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dnl Process this file with autoconf to produce a configure script.
dnl NOTE FOR MAINTAINERS: Do not use minor version numbers 08 or 09 because
dnl the leading zeros may cause them to be treated as invalid octal constants
dnl if a PCRE2 user writes code that uses PCRE2_MINOR as a number. There is now
dnl a check further down that throws an error if 08 or 09 are used.
dnl The PCRE2_PRERELEASE feature is for identifying release candidates. It might
dnl be defined as -RC2, for example. For real releases, it should be empty.
m4_define(pcre2_major, [10])
m4_define(pcre2_minor, [46])
m4_define(pcre2_prerelease, [-DEV])
m4_define(pcre2_date, [2024-06-09])
# Libtool shared library interface versions (current:revision:age)
m4_define(libpcre2_8_version, [14:0:14])
m4_define(libpcre2_16_version, [14:0:14])
m4_define(libpcre2_32_version, [14:0:14])
m4_define(libpcre2_posix_version, [3:6:0])
# NOTE: The CMakeLists.txt file searches for the above variables in the first
# 50 lines of this file. Please update that if the variables above are moved.
AC_PREREQ([2.60])
AC_INIT([PCRE2],pcre2_major.pcre2_minor[]pcre2_prerelease,[],[pcre2])
AC_CONFIG_SRCDIR([src/pcre2.h.in])
AM_INIT_AUTOMAKE([dist-bzip2 dist-zip foreign])
m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
AC_CONFIG_HEADERS(src/config.h)
# This was added at the suggestion of libtoolize (03-Jan-10)
AC_CONFIG_MACRO_DIR([m4])
# The default CFLAGS in Autoconf are "-g -O2" for gcc and just "-g" for any
# other compiler. There doesn't seem to be a standard way of getting rid of the
# -g (which I don't think is needed for a production library). This fudge seems
# to achieve the necessary. First, we remember the externally set values of
# CFLAGS. Then call the AC_PROG_CC macro to find the compiler - if CFLAGS is
# not set, it will be set to Autoconf's defaults. Afterwards, if the original
# values were not set, remove the -g from the Autoconf defaults.
remember_set_CFLAGS="$CFLAGS"
m4_version_prereq(2.70, [AC_PROG_CC], [AC_PROG_CC_C99])
AM_PROG_CC_C_O
AC_USE_SYSTEM_EXTENSIONS
if test "x$remember_set_CFLAGS" = "x"
then
if test "$CFLAGS" = "-g -O2"
then
CFLAGS="-O2"
elif test "$CFLAGS" = "-g"
then
CFLAGS=""
fi
fi
# This is a new thing required to stop a warning from automake 1.12
m4_ifdef([AM_PROG_AR], [AM_PROG_AR])
# Check for a 64-bit integer type
AC_TYPE_INT64_T
AC_PROG_INSTALL
LT_INIT([win32-dll])
AC_PROG_LN_S
AC_SYS_LARGEFILE
# Check for GCC visibility feature
PCRE2_VISIBILITY
# Check for Clang __attribute__((uninitialized)) feature
AC_MSG_CHECKING([for __attribute__((uninitialized))])
AC_LANG_PUSH([C])
tmp_CFLAGS=$CFLAGS
if test $WORKING_WERROR -eq 1; then
CFLAGS="$CFLAGS -Werror"
fi
AC_COMPILE_IFELSE([AC_LANG_PROGRAM(,
[[char buf[128] __attribute__((uninitialized));(void)buf]])],
[pcre2_cc_cv_attribute_uninitialized=yes],
[pcre2_cc_cv_attribute_uninitialized=no])
AC_MSG_RESULT([$pcre2_cc_cv_attribute_uninitialized])
if test "$pcre2_cc_cv_attribute_uninitialized" = yes; then
AC_DEFINE([HAVE_ATTRIBUTE_UNINITIALIZED], 1, [Define this if your compiler
supports __attribute__((uninitialized))])
fi
CFLAGS=$tmp_CFLAGS
AC_LANG_POP([C])
# Check for the assume() builtin
AC_MSG_CHECKING([for __assume()])
AC_LANG_PUSH([C])
AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[__assume(1)]])],
[pcre2_cc_cv_builtin_assume=yes],
[pcre2_cc_cv_builtin_assume=no])
AC_MSG_RESULT([$pcre2_cc_cv_builtin_assume])
if test "$pcre2_cc_cv_builtin_assume" = yes; then
AC_DEFINE([HAVE_BUILTIN_ASSUME], 1,
[Define this if your compiler provides __assume()])
fi
AC_LANG_POP([C])
# Check for the mul_overflow() builtin
AC_MSG_CHECKING([for __builtin_mul_overflow()])
AC_LANG_PUSH([C])
AC_LINK_IFELSE([AC_LANG_PROGRAM([[
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#include <stddef.h>
int a, b;
size_t m;
]], [[__builtin_mul_overflow(a, b, &m)]])],
[pcre2_cc_cv_builtin_mul_overflow=yes],
[pcre2_cc_cv_builtin_mul_overflow=no])
AC_MSG_RESULT([$pcre2_cc_cv_builtin_mul_overflow])
if test "$pcre2_cc_cv_builtin_mul_overflow" = yes; then
AC_DEFINE([HAVE_BUILTIN_MUL_OVERFLOW], 1,
[Define this if your compiler provides __builtin_mul_overflow()])
fi
AC_LANG_POP([C])
# Check for the unreachable() builtin
AC_MSG_CHECKING([for __builtin_unreachable()])
AC_LANG_PUSH([C])
AC_LINK_IFELSE([AC_LANG_PROGRAM([[int r;]], [[if (r) __builtin_unreachable()]])],
[pcre2_cc_cv_builtin_unreachable=yes],
[pcre2_cc_cv_builtin_unreachable=no])
AC_MSG_RESULT([$pcre2_cc_cv_builtin_unreachable])
if test "$pcre2_cc_cv_builtin_unreachable" = yes; then
AC_DEFINE([HAVE_BUILTIN_UNREACHABLE], 1,
[Define this if your compiler provides __builtin_unreachable()])
fi
AC_LANG_POP([C])
# Versioning
PCRE2_MAJOR="pcre2_major"
PCRE2_MINOR="pcre2_minor"
PCRE2_PRERELEASE="pcre2_prerelease"
PCRE2_DATE="pcre2_date"
if test "$PCRE2_MINOR" = "08" -o "$PCRE2_MINOR" = "09"
then
echo "***"
echo "*** Minor version number $PCRE2_MINOR must not be used. ***"
echo "*** Use only 00 to 07 or 10 onwards, to avoid octal issues. ***"
echo "***"
exit 1
fi
AC_SUBST(PCRE2_MAJOR)
AC_SUBST(PCRE2_MINOR)
AC_SUBST(PCRE2_PRERELEASE)
AC_SUBST(PCRE2_DATE)
# Set a more sensible default value for $(htmldir).
if test "x$htmldir" = 'x${docdir}'
then
htmldir='${docdir}/html'
fi
# Force an error for PCRE1 size options
AC_ARG_ENABLE(pcre8,,,enable_pcre8=no)
AC_ARG_ENABLE(pcre16,,,enable_pcre16=no)
AC_ARG_ENABLE(pcre32,,,enable_pcre32=no)
if test "$enable_pcre8$enable_pcre16$enable_pcre32" != "nonono"
then
echo "** ERROR: Use --[[en|dis]]able-pcre2-[[8|16|32]], not --[[en|dis]]able-pcre[[8|16|32]]"
exit 1
fi
# Handle --disable-pcre2-8 (enabled by default)
AC_ARG_ENABLE(pcre2-8,
AS_HELP_STRING([--disable-pcre2-8],
[disable 8 bit character support]),
, enable_pcre2_8=unset)
AC_SUBST(enable_pcre2_8)
# Handle --enable-pcre2-16 (disabled by default)
AC_ARG_ENABLE(pcre2-16,
AS_HELP_STRING([--enable-pcre2-16],
[enable 16 bit character support]),
, enable_pcre2_16=unset)
AC_SUBST(enable_pcre2_16)
# Handle --enable-pcre2-32 (disabled by default)
AC_ARG_ENABLE(pcre2-32,
AS_HELP_STRING([--enable-pcre2-32],
[enable 32 bit character support]),
, enable_pcre2_32=unset)
AC_SUBST(enable_pcre2_32)
# Handle --enable-debug (disabled by default)
AC_ARG_ENABLE(debug,
AS_HELP_STRING([--enable-debug],
[enable debugging code]),
, enable_debug=no)
# Handle --enable-jit (disabled by default)
AC_ARG_ENABLE(jit,
AS_HELP_STRING([--enable-jit],
[enable Just-In-Time compiling support]),
, enable_jit=no)
# This code enables JIT if the hardware supports it.
if test "$enable_jit" = "auto"; then
AC_LANG(C)
SAVE_CPPFLAGS=$CPPFLAGS
CPPFLAGS=-I$srcdir
AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
#define SLJIT_CONFIG_AUTO 1
#include "deps/sljit/sljit_src/sljitConfigCPU.h"
#if (defined SLJIT_CONFIG_UNSUPPORTED && SLJIT_CONFIG_UNSUPPORTED)
#error unsupported
#endif]])], enable_jit=yes, enable_jit=no)
CPPFLAGS=$SAVE_CPPFLAGS
echo checking for JIT support on this hardware... $enable_jit
fi
# Handle --enable-jit-sealloc (disabled by default and only experimental)
case $host_os in
linux* | netbsd*)
AC_ARG_ENABLE(jit-sealloc,
AS_HELP_STRING([--enable-jit-sealloc],
[enable SELinux compatible execmem allocator in JIT (experimental)]),
,enable_jit_sealloc=no)
;;
*)
enable_jit_sealloc=unsupported
;;
esac
# Handle --disable-pcre2grep-jit (enabled by default)
AC_ARG_ENABLE(pcre2grep-jit,
AS_HELP_STRING([--disable-pcre2grep-jit],
[disable JIT support in pcre2grep]),
, enable_pcre2grep_jit=yes)
# Handle --disable-pcre2grep-callout (enabled by default)
AC_ARG_ENABLE(pcre2grep-callout,
AS_HELP_STRING([--disable-pcre2grep-callout],
[disable callout script support in pcre2grep]),
, enable_pcre2grep_callout=yes)
# Handle --disable-pcre2grep-callout-fork (enabled by default)
AC_ARG_ENABLE(pcre2grep-callout-fork,
AS_HELP_STRING([--disable-pcre2grep-callout-fork],
[disable callout script fork support in pcre2grep]),
, enable_pcre2grep_callout_fork=yes)
# Handle --enable-rebuild-chartables
AC_ARG_ENABLE(rebuild-chartables,
AS_HELP_STRING([--enable-rebuild-chartables],
[rebuild character tables in current locale]),
, enable_rebuild_chartables=no)
# Handle --disable-unicode (enabled by default)
AC_ARG_ENABLE(unicode,
AS_HELP_STRING([--disable-unicode],
[disable Unicode support]),
, enable_unicode=unset)
# Handle newline options
ac_pcre2_newline=lf
AC_ARG_ENABLE(newline-is-cr,
AS_HELP_STRING([--enable-newline-is-cr],
[use CR as newline character]),
ac_pcre2_newline=cr)
AC_ARG_ENABLE(newline-is-lf,
AS_HELP_STRING([--enable-newline-is-lf],
[use LF as newline character (default)]),
ac_pcre2_newline=lf)
AC_ARG_ENABLE(newline-is-crlf,
AS_HELP_STRING([--enable-newline-is-crlf],
[use CRLF as newline sequence]),
ac_pcre2_newline=crlf)
AC_ARG_ENABLE(newline-is-anycrlf,
AS_HELP_STRING([--enable-newline-is-anycrlf],
[use CR, LF, or CRLF as newline sequence]),
ac_pcre2_newline=anycrlf)
AC_ARG_ENABLE(newline-is-any,
AS_HELP_STRING([--enable-newline-is-any],
[use any valid Unicode newline sequence]),
ac_pcre2_newline=any)
AC_ARG_ENABLE(newline-is-nul,
AS_HELP_STRING([--enable-newline-is-nul],
[use NUL (binary zero) as newline character]),
ac_pcre2_newline=nul)
enable_newline="$ac_pcre2_newline"
# Handle --enable-bsr-anycrlf
AC_ARG_ENABLE(bsr-anycrlf,
AS_HELP_STRING([--enable-bsr-anycrlf],
[\R matches only CR, LF, CRLF by default]),
, enable_bsr_anycrlf=no)
# Handle --enable-never-backslash-C
AC_ARG_ENABLE(never-backslash-C,
AS_HELP_STRING([--enable-never-backslash-C],
[use of \C causes an error]),
, enable_never_backslash_C=no)
# Handle --enable-ebcdic
AC_ARG_ENABLE(ebcdic,
AS_HELP_STRING([--enable-ebcdic],
[assume EBCDIC coding rather than ASCII; incompatible with --enable-unicode; use only in (uncommon) EBCDIC environments; it implies --enable-rebuild-chartables]),
, enable_ebcdic=no)
# Handle --enable-ebcdic-nl25
AC_ARG_ENABLE(ebcdic-nl25,
AS_HELP_STRING([--enable-ebcdic-nl25],
[set EBCDIC code for NL to 0x25 instead of 0x15; it implies --enable-ebcdic]),
, enable_ebcdic_nl25=no)
# Handle --enable-pcre2grep-libz
AC_ARG_ENABLE(pcre2grep-libz,
AS_HELP_STRING([--enable-pcre2grep-libz],
[link pcre2grep with libz to handle .gz files]),
, enable_pcre2grep_libz=no)
# Handle --enable-pcre2grep-libbz2
AC_ARG_ENABLE(pcre2grep-libbz2,
AS_HELP_STRING([--enable-pcre2grep-libbz2],
[link pcre2grep with libbz2 to handle .bz2 files]),
, enable_pcre2grep_libbz2=no)
# Handle --with-pcre2grep-bufsize=N
AC_ARG_WITH(pcre2grep-bufsize,
AS_HELP_STRING([--with-pcre2grep-bufsize=N],
[pcre2grep initial buffer size (default=20480, minimum=8192)]),
, with_pcre2grep_bufsize=20480)
# Handle --with-pcre2grep-max-bufsize=N
AC_ARG_WITH(pcre2grep-max-bufsize,
AS_HELP_STRING([--with-pcre2grep-max-bufsize=N],
[pcre2grep maximum buffer size (default=1048576, minimum=8192)]),
, with_pcre2grep_max_bufsize=1048576)
# Handle --enable-pcre2test-libedit
AC_ARG_ENABLE(pcre2test-libedit,
AS_HELP_STRING([--enable-pcre2test-libedit],
[link pcre2test with libedit]),
, enable_pcre2test_libedit=no)
# Handle --enable-pcre2test-libreadline
AC_ARG_ENABLE(pcre2test-libreadline,
AS_HELP_STRING([--enable-pcre2test-libreadline],
[link pcre2test with libreadline]),
, enable_pcre2test_libreadline=no)
# Handle --with-link-size=N
AC_ARG_WITH(link-size,
AS_HELP_STRING([--with-link-size=N],
[internal link size (2, 3, or 4 allowed; default=2)]),
, with_link_size=2)
# Handle --with-max-varlookbehind=N
AC_ARG_WITH(max-varlookbehind,
AS_HELP_STRING([--with-max-varlookbehind=N],
[maximum length of variable lookbehind (default=255)]),
, with_max_varlookbehind=255)
# Handle --with-parens-nest-limit=N
AC_ARG_WITH(parens-nest-limit,
AS_HELP_STRING([--with-parens-nest-limit=N],
[nested parentheses limit (default=250)]),
, with_parens_nest_limit=250)
# Handle --with-heap-limit
AC_ARG_WITH(heap-limit,
AS_HELP_STRING([--with-heap-limit=N],
[default limit on heap memory (kibibytes, default=20000000)]),
, with_heap_limit=20000000)
# Handle --with-match-limit=N
AC_ARG_WITH(match-limit,
AS_HELP_STRING([--with-match-limit=N],
[default limit on internal looping (default=10000000)]),
, with_match_limit=10000000)
# Handle --with-match-limit-depth=N
# Recognize old synonym --with-match-limit-recursion
#
# Note: In config.h, the default is to define MATCH_LIMIT_DEPTH symbolically as
# MATCH_LIMIT, which in turn is defined to be some numeric value (e.g.
# 10000000). MATCH_LIMIT_DEPTH can otherwise be set to some different numeric
# value (or even the same numeric value as MATCH_LIMIT, though no longer
# defined in terms of the latter).
#
AC_ARG_WITH(match-limit-depth,
AS_HELP_STRING([--with-match-limit-depth=N],
[default limit on match tree depth (default=MATCH_LIMIT)]),
, with_match_limit_depth=MATCH_LIMIT)
AC_ARG_WITH(match-limit-recursion,,
, with_match_limit_recursion=UNSET)
# Handle --enable-valgrind
AC_ARG_ENABLE(valgrind,
AS_HELP_STRING([--enable-valgrind],
[enable valgrind support]),
, enable_valgrind=no)
# Enable code coverage reports using gcov
AC_ARG_ENABLE(coverage,
AS_HELP_STRING([--enable-coverage],
[enable code coverage reports using gcov]),
, enable_coverage=no)
# Handle --enable-fuzz-support
AC_ARG_ENABLE(fuzz_support,
AS_HELP_STRING([--enable-fuzz-support],
[enable fuzzer support]),
, enable_fuzz_support=no)
# Handle --enable-diff-fuzz-support
AC_ARG_ENABLE(diff_fuzz_support,
AS_HELP_STRING([--enable-diff-fuzz-support],
[enable differential fuzzer support]),
, enable_diff_fuzz_support=no)
# Handle --disable-stack-for-recursion
# This option became obsolete at release 10.30.
AC_ARG_ENABLE(stack-for-recursion,,
, enable_stack_for_recursion=yes)
# Original code
# AC_ARG_ENABLE(stack-for-recursion,
# AS_HELP_STRING([--disable-stack-for-recursion],
# [don't use stack recursion when matching]),
# , enable_stack_for_recursion=yes)
# Handle --disable-percent_zt (set as "auto" by default)
AC_ARG_ENABLE(percent-zt,
AS_HELP_STRING([--disable-percent-zt],
[disable the use of z and t formatting modifiers]),
, enable_percent_zt=auto)
# Handle --enable-Werror/errwarn
AC_ARG_ENABLE(Werror,
AS_HELP_STRING([--enable-Werror],
[Add -Werror to CFLAGS (GCC/Clang style); if -Werror is passed to ./configure via CFLAGS it interferes with feature detection]),
, enable_Werror=no)
AC_ARG_ENABLE(errwarn,
AS_HELP_STRING([--enable-errwarn],
[Add -errwarn=%all to CFLAGS (Sun cc style)]),
, enable_errwarn=no)
# Set the default value for pcre2-8
if test "x$enable_pcre2_8" = "xunset"
then
enable_pcre2_8=yes
fi
# Set the default value for pcre2-16
if test "x$enable_pcre2_16" = "xunset"
then
enable_pcre2_16=no
fi
# Set the default value for pcre2-32
if test "x$enable_pcre2_32" = "xunset"
then
enable_pcre2_32=no
fi
# Make sure at least one library is selected
if test "x$enable_pcre2_8$enable_pcre2_16$enable_pcre2_32" = "xnonono"
then
AC_MSG_ERROR([At least one of the 8, 16 or 32 bit libraries must be enabled])
fi
# Unicode is enabled by default.
if test "x$enable_unicode" = "xunset"
then
enable_unicode=yes
fi
# Convert the newline identifier into the appropriate integer value. These must
# agree with the PCRE2_NEWLINE_xxx values in pcre2.h.
case "$enable_newline" in
cr) ac_pcre2_newline_value=1 ;;
lf) ac_pcre2_newline_value=2 ;;
crlf) ac_pcre2_newline_value=3 ;;
any) ac_pcre2_newline_value=4 ;;
anycrlf) ac_pcre2_newline_value=5 ;;
nul) ac_pcre2_newline_value=6 ;;
*)
AC_MSG_ERROR([invalid argument "$enable_newline" to --enable-newline option])
;;
esac
# --enable-ebcdic-nl25 implies --enable-ebcdic
if test "x$enable_ebcdic_nl25" = "xyes"; then
enable_ebcdic=yes
fi
# Make sure that if enable_ebcdic is set, rebuild_chartables is also enabled.
# Also check that UTF support is not requested, because PCRE2 cannot handle
# EBCDIC and UTF in the same build. To do so it would need to use different
# character constants depending on the mode. Also, EBCDIC cannot be used with
# 16-bit and 32-bit libraries.
#
if test "x$enable_ebcdic" = "xyes"; then
enable_rebuild_chartables=yes
if test "x$enable_unicode" = "xyes"; then
AC_MSG_ERROR([support for EBCDIC and Unicode cannot be enabled at the same time])
fi
if test "x$enable_pcre2_16" = "xyes" -o "x$enable_pcre2_32" = "xyes"; then
AC_MSG_ERROR([EBCDIC support is available only for the 8-bit library])
fi
fi
# Check argument to --with-link-size
case "$with_link_size" in
2|3|4) ;;
*)
AC_MSG_ERROR([invalid argument "$with_link_size" to --with-link-size option])
;;
esac
AH_TOP([
/* PCRE2 is written in Standard C, but there are a few non-standard things it
can cope with, allowing it to run on SunOS4 and other "close to standard"
systems.
In environments that support the GNU autotools, config.h.in is converted into
config.h by the "configure" script. In environments that use CMake,
config-cmake.in is converted into config.h. If you are going to build PCRE2 "by
hand" without using "configure" or CMake, you should copy the distributed
config.h.generic to config.h, and edit the macro definitions to be the way you
need them. You must then add -DHAVE_CONFIG_H to all of your compile commands,
so that config.h is included at the start of every source.
Alternatively, you can avoid editing by using -D on the compiler command line
to set the macro values. In this case, you do not have to set -DHAVE_CONFIG_H,
but if you do, default values will be taken from config.h for non-boolean
macros that are not defined on the command line.
Boolean macros such as HAVE_STDLIB_H and SUPPORT_PCRE2_8 should either be
defined (conventionally to 1) for TRUE, and not defined at all for FALSE. All
such macros are listed as a commented #undef in config.h.generic. Macros such
as MATCH_LIMIT, whose actual value is relevant, have defaults defined, but are
surrounded by #ifndef/#endif lines so that the value can be overridden by -D.
PCRE2 uses memmove() if HAVE_MEMMOVE is defined; otherwise it uses bcopy() if
HAVE_BCOPY is defined. If your system has neither bcopy() nor memmove(), make
sure both macros are undefined; an emulation function will then be used. */])
# Checks for header files.
AC_CHECK_HEADERS(assert.h limits.h sys/types.h sys/stat.h dirent.h)
AC_CHECK_HEADERS([windows.h], [HAVE_WINDOWS_H=1])
AC_CHECK_HEADERS([sys/wait.h], [HAVE_SYS_WAIT_H=1])
# Conditional compilation
AM_CONDITIONAL(WITH_PCRE2_8, test "x$enable_pcre2_8" = "xyes")
AM_CONDITIONAL(WITH_PCRE2_16, test "x$enable_pcre2_16" = "xyes")
AM_CONDITIONAL(WITH_PCRE2_32, test "x$enable_pcre2_32" = "xyes")
AM_CONDITIONAL(WITH_REBUILD_CHARTABLES, test "x$enable_rebuild_chartables" = "xyes")
AM_CONDITIONAL(WITH_JIT, test "x$enable_jit" = "xyes")
AM_CONDITIONAL(WITH_UNICODE, test "x$enable_unicode" = "xyes")
AM_CONDITIONAL(WITH_VALGRIND, test "x$enable_valgrind" = "xyes")
AM_CONDITIONAL(WITH_FUZZ_SUPPORT, test "x$enable_fuzz_support" = "xyes")
AM_CONDITIONAL(WITH_DIFF_FUZZ_SUPPORT, test "x$enable_diff_fuzz_support" = "xyes")
if test "$enable_fuzz_support" = "yes" -a "$enable_pcre2_8" = "no"; then
echo "** ERROR: Fuzzer support requires the 8-bit library"
exit 1
fi
if test "$enable_diff_fuzz_support" = "yes"; then
if test "$enable_fuzz_support" = "no"; then
echo "** ERROR: Differential fuzzing support requires fuzzing support"
exit 1
fi
if test "$enable_jit" = "no"; then
echo "** ERROR: Differential fuzzing support requires Just-in-Time compilation support"
exit 1
fi
AC_DEFINE([SUPPORT_DIFF_FUZZ], [], [
Define to any value to enable differential fuzzing support.])
fi
# Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_TYPE_SIZE_T
# Checks for library functions.
AC_CHECK_FUNCS(bcopy memfd_create memmove mkostemp secure_getenv strerror)
AC_MSG_CHECKING([for realpath])
AC_LINK_IFELSE([AC_LANG_PROGRAM([[
#include <stdlib.h>
#include <limits.h>
]],[[
char buffer[PATH_MAX];
realpath(".", buffer);
]])],
[AC_MSG_RESULT([yes])
AC_DEFINE([HAVE_REALPATH], 1,
[Define to 1 if you have the `realpath' function.])
],
AC_MSG_RESULT([no]))
# Check for the availability of libz (aka zlib)
AC_CHECK_HEADERS([zlib.h], [HAVE_ZLIB_H=1])
AC_CHECK_LIB([z], [gzopen], [HAVE_LIBZ=1])
# Check for the availability of libbz2. Originally we just used AC_CHECK_LIB,
# as for libz. However, this had the following problem, diagnosed and fixed by
# a user:
#
# - libbz2 uses the Pascal calling convention (WINAPI) for the functions
# under Win32.
# - The standard autoconf AC_CHECK_LIB fails to include "bzlib.h",
# therefore missing the function definition.
# - The compiler thus generates a "C" signature for the test function.
# - The linker fails to find the "C" function.
# - PCRE2 fails to configure if asked to do so against libbz2.
#
# Solution:
#
# - Replace the AC_CHECK_LIB test with a custom test.
AC_CHECK_HEADERS([bzlib.h], [HAVE_BZLIB_H=1])
# Original test
# AC_CHECK_LIB([bz2], [BZ2_bzopen], [HAVE_LIBBZ2=1])
#
# Custom test follows
AC_MSG_CHECKING([for libbz2])
OLD_LIBS="$LIBS"
LIBS="$LIBS -lbz2"
AC_LINK_IFELSE([AC_LANG_PROGRAM([[
#ifdef HAVE_BZLIB_H
#include <bzlib.h>
#endif]],
[[return (int)BZ2_bzopen("conftest", "rb");]])],
[AC_MSG_RESULT([yes]);HAVE_LIBBZ2=1; break;],
AC_MSG_RESULT([no]))
LIBS="$OLD_LIBS"
# Check for the availabiity of libreadline
if test "$enable_pcre2test_libreadline" = "yes"; then
AC_CHECK_HEADERS([readline/readline.h], [HAVE_READLINE_H=1])
AC_CHECK_HEADERS([readline/history.h], [HAVE_HISTORY_H=1])
AC_CHECK_LIB([readline], [readline], [LIBREADLINE="-lreadline"],
[unset ac_cv_lib_readline_readline;
AC_CHECK_LIB([readline], [readline], [LIBREADLINE="-ltinfo"],
[unset ac_cv_lib_readline_readline;
AC_CHECK_LIB([readline], [readline], [LIBREADLINE="-lcurses"],
[unset ac_cv_lib_readline_readline;
AC_CHECK_LIB([readline], [readline], [LIBREADLINE="-lncurses"],
[unset ac_cv_lib_readline_readline;
AC_CHECK_LIB([readline], [readline], [LIBREADLINE="-lncursesw"],
[unset ac_cv_lib_readline_readline;
AC_CHECK_LIB([readline], [readline], [LIBREADLINE="-ltermcap"],
[LIBREADLINE=""],
[-ltermcap])],
[-lncursesw])],
[-lncurses])],
[-lcurses])],
[-ltinfo])])
AC_SUBST(LIBREADLINE)
if test -n "$LIBREADLINE"; then
if test "$LIBREADLINE" != "-lreadline"; then
echo "-lreadline needs $LIBREADLINE"
LIBREADLINE="-lreadline $LIBREADLINE"
fi
fi
fi
# Check for the availability of libedit. Different distributions put its
# headers in different places. Try to cover the most common ones.
if test "$enable_pcre2test_libedit" = "yes"; then
AC_CHECK_HEADERS([editline/readline.h edit/readline/readline.h readline.h], [
HAVE_LIBEDIT_HEADER=1
break
])
AC_CHECK_LIB([edit], [readline], [LIBEDIT="-ledit"])
fi
PCRE2_STATIC_CFLAG=""
if test "x$enable_shared" = "xno" ; then
AC_DEFINE([PCRE2_STATIC], [1], [
Define to any value if linking statically (TODO: make nice with Libtool)])
PCRE2_STATIC_CFLAG="-DPCRE2_STATIC"
fi
AC_SUBST(PCRE2_STATIC_CFLAG)
PCRE2POSIX_CFLAG=""
if test "x$enable_shared" = "xyes" ; then
PCRE2POSIX_CFLAG="-DPCRE2POSIX_SHARED"
fi
AC_SUBST(PCRE2POSIX_CFLAG)
# Here is where PCRE2-specific defines are handled
if test "$enable_pcre2_8" = "yes"; then
AC_DEFINE([SUPPORT_PCRE2_8], [], [
Define to any value to enable the 8 bit PCRE2 library.])
fi
if test "$enable_pcre2_16" = "yes"; then
AC_DEFINE([SUPPORT_PCRE2_16], [], [
Define to any value to enable the 16 bit PCRE2 library.])
fi
if test "$enable_pcre2_32" = "yes"; then
AC_DEFINE([SUPPORT_PCRE2_32], [], [
Define to any value to enable the 32 bit PCRE2 library.])
fi
if test "$enable_debug" = "yes"; then
AC_DEFINE([PCRE2_DEBUG], [], [
Define to any value to include debugging code.])
fi
if test "$enable_percent_zt" = "no"; then
AC_DEFINE([DISABLE_PERCENT_ZT], [], [
Define to any value to disable the use of the z and t modifiers in
formatting settings such as %zu or %td (this is rarely needed).])
else
enable_percent_zt=auto
fi
# Unless running under Windows, JIT support requires pthreads.
if test "$enable_jit" = "yes"; then
if test "$HAVE_WINDOWS_H" != "1"; then
AX_PTHREAD([], [AC_MSG_ERROR([JIT support requires pthreads])])
CC="$PTHREAD_CC"
CFLAGS="$PTHREAD_CFLAGS $CFLAGS"
LIBS="$PTHREAD_LIBS $LIBS"
fi
AC_DEFINE([SUPPORT_JIT], [], [
Define to any value to enable support for Just-In-Time compiling.])
else
enable_pcre2grep_jit="no"
fi
if test "$enable_jit_sealloc" = "yes"; then
AC_DEFINE([SLJIT_PROT_EXECUTABLE_ALLOCATOR], [1], [
Define to any non-zero number to enable support for SELinux
compatible executable memory allocator in JIT. Note that this
will have no effect unless SUPPORT_JIT is also defined.])
fi
if test "$enable_pcre2grep_jit" = "yes"; then
AC_DEFINE([SUPPORT_PCRE2GREP_JIT], [], [
Define to any value to enable JIT support in pcre2grep. Note that this will
have no effect unless SUPPORT_JIT is also defined.])
fi
if test "$enable_pcre2grep_callout" = "yes"; then
if test "$enable_pcre2grep_callout_fork" = "yes"; then
if test "$HAVE_WINDOWS_H" != "1"; then
if test "$HAVE_SYS_WAIT_H" != "1"; then
AC_MSG_ERROR([Callout script support needs sys/wait.h.])
fi
fi
AC_DEFINE([SUPPORT_PCRE2GREP_CALLOUT_FORK], [], [
Define to any value to enable fork support in pcre2grep callout scripts.
This will have no effect unless SUPPORT_PCRE2GREP_CALLOUT is also
defined.])
fi
AC_DEFINE([SUPPORT_PCRE2GREP_CALLOUT], [], [
Define to any value to enable callout script support in pcre2grep.])
else
enable_pcre2grep_callout_fork="no"
fi
if test "$enable_unicode" = "yes"; then
AC_DEFINE([SUPPORT_UNICODE], [], [
Define to any value to enable support for Unicode and UTF encoding.
This will work even in an EBCDIC environment, but it is incompatible
with the EBCDIC macro. That is, PCRE2 can support *either* EBCDIC
code *or* ASCII/Unicode, but not both at once.])
fi
if test "$enable_pcre2grep_libz" = "yes"; then
AC_DEFINE([SUPPORT_LIBZ], [], [
Define to any value to allow pcre2grep to be linked with libz, so that it is
able to handle .gz files.])
fi
if test "$enable_pcre2grep_libbz2" = "yes"; then
AC_DEFINE([SUPPORT_LIBBZ2], [], [
Define to any value to allow pcre2grep to be linked with libbz2, so that it
is able to handle .bz2 files.])
fi
if test $with_pcre2grep_bufsize -lt 8192 ; then
AC_MSG_WARN([$with_pcre2grep_bufsize is too small for --with-pcre2grep-bufsize; using 8192])
with_pcre2grep_bufsize="8192"
else
if test $? -gt 1 ; then
AC_MSG_ERROR([Bad value for --with-pcre2grep-bufsize])
fi
fi
if test $with_pcre2grep_max_bufsize -lt $with_pcre2grep_bufsize ; then
with_pcre2grep_max_bufsize="$with_pcre2grep_bufsize"
else
if test $? -gt 1 ; then
AC_MSG_ERROR([Bad value for --with-pcre2grep-max-bufsize])
fi
fi
AC_DEFINE_UNQUOTED([PCRE2GREP_BUFSIZE], [$with_pcre2grep_bufsize], [
The value of PCRE2GREP_BUFSIZE is the starting size of the buffer used by
pcre2grep to hold parts of the file it is searching. The buffer will be
expanded up to PCRE2GREP_MAX_BUFSIZE if necessary, for files containing very
long lines. The actual amount of memory used by pcre2grep is three times this
number, because it allows for the buffering of "before" and "after" lines.])
AC_DEFINE_UNQUOTED([PCRE2GREP_MAX_BUFSIZE], [$with_pcre2grep_max_bufsize], [
The value of PCRE2GREP_MAX_BUFSIZE specifies the maximum size of the buffer
used by pcre2grep to hold parts of the file it is searching. The actual
amount of memory used by pcre2grep is three times this number, because it
allows for the buffering of "before" and "after" lines.])
if test "$enable_pcre2test_libedit" = "yes"; then
AC_DEFINE([SUPPORT_LIBEDIT], [], [
Define to any value to allow pcre2test to be linked with libedit.])
LIBREADLINE="$LIBEDIT"
elif test "$enable_pcre2test_libreadline" = "yes"; then
AC_DEFINE([SUPPORT_LIBREADLINE], [], [
Define to any value to allow pcre2test to be linked with libreadline.])
fi
AC_DEFINE_UNQUOTED([NEWLINE_DEFAULT], [$ac_pcre2_newline_value], [
The value of NEWLINE_DEFAULT determines the default newline character
sequence. PCRE2 client programs can override this by selecting other values
at run time. The valid values are 1 (CR), 2 (LF), 3 (CRLF), 4 (ANY),
5 (ANYCRLF), and 6 (NUL).])
if test "$enable_bsr_anycrlf" = "yes"; then
AC_DEFINE([BSR_ANYCRLF], [], [
By default, the \R escape sequence matches any Unicode line ending
character or sequence of characters. If BSR_ANYCRLF is defined (to any
value), this is changed so that backslash-R matches only CR, LF, or CRLF.
The build-time default can be overridden by the user of PCRE2 at runtime.])
fi
if test "$enable_never_backslash_C" = "yes"; then
AC_DEFINE([NEVER_BACKSLASH_C], [], [
Defining NEVER_BACKSLASH_C locks out the use of \C in all patterns.])
fi
AC_DEFINE_UNQUOTED([LINK_SIZE], [$with_link_size], [
The value of LINK_SIZE determines the number of bytes used to store
links as offsets within the compiled regex. The default is 2, which
allows for compiled patterns up to 65535 code units long. This covers the
vast majority of cases. However, PCRE2 can also be compiled to use 3 or 4
bytes instead. This allows for longer patterns in extreme cases.])
AC_DEFINE_UNQUOTED([MAX_VARLOOKBEHIND], [$with_max_varlookbehind], [
The value of MAX_VARLOOKBEHIND specifies the default maximum length, in
characters, for a variable-length lookbehind assertion.])
AC_DEFINE_UNQUOTED([PARENS_NEST_LIMIT], [$with_parens_nest_limit], [
The value of PARENS_NEST_LIMIT specifies the maximum depth of nested
parentheses (of any kind) in a pattern. This limits the amount of system
stack that is used while compiling a pattern.])
AC_DEFINE_UNQUOTED([MATCH_LIMIT], [$with_match_limit], [
The value of MATCH_LIMIT determines the default number of times the
pcre2_match() function can record a backtrack position during a single
matching attempt. The value is also used to limit a loop counter in
pcre2_dfa_match(). There is a runtime interface for setting a different
limit. The limit exists in order to catch runaway regular expressions that
take forever to determine that they do not match. The default is set very
large so that it does not accidentally catch legitimate cases.])
# --with-match-limit-recursion is an obsolete synonym for --with-match-limit-depth
if test "$with_match_limit_recursion" != "UNSET"; then
cat <<EOF
WARNING: --with-match-limit-recursion is an obsolete option. Please use
--with-match-limit-depth in future. If both are set, --with-match-limit-depth
will be used. See also --with-heap-limit.
EOF
if test "$with_match_limit_depth" = "MATCH_LIMIT"; then
with_match_limit_depth=$with_match_limit_recursion
fi
fi
AC_DEFINE_UNQUOTED([MATCH_LIMIT_DEPTH], [$with_match_limit_depth], [
The above limit applies to all backtracks, whether or not they are nested. In
some environments it is desirable to limit the nesting of backtracking (that
is, the depth of tree that is searched) more strictly, in order to restrict
the maximum amount of heap memory that is used. The value of
MATCH_LIMIT_DEPTH provides this facility. To have any useful effect, it must
be less than the value of MATCH_LIMIT. The default is to use the same value
as MATCH_LIMIT. There is a runtime method for setting a different limit. In
the case of pcre2_dfa_match(), this limit controls the depth of the internal
nested function calls that are used for pattern recursions, lookarounds, and
atomic groups.])
AC_DEFINE_UNQUOTED([HEAP_LIMIT], [$with_heap_limit], [
This limits the amount of memory that may be used while matching
a pattern. It applies to both pcre2_match() and pcre2_dfa_match(). It does
not apply to JIT matching. The value is in kibibytes (units of 1024 bytes).])
AC_DEFINE([MAX_NAME_SIZE], [128], [
This limit is parameterized just in case anybody ever wants to
change it. Care must be taken if it is increased, because it guards
against integer overflow caused by enormously large patterns.])
AC_DEFINE([MAX_NAME_COUNT], [10000], [
This limit is parameterized just in case anybody ever wants to
change it. Care must be taken if it is increased, because it guards
against integer overflow caused by enormously large patterns.])
AH_VERBATIM([PCRE2_EXP_DEFN], [
/* If you are compiling for a system other than a Unix-like system or
Win32, and it needs some magic to be inserted before the definition
of a function that is exported by the library, define this macro to
contain the relevant magic. If you do not define this macro, a suitable
__declspec value is used for Windows systems; in other environments
a compiler relevant "extern" is used with any "visibility" related
attributes from PCRE2_EXPORT included.
This macro apears at the start of every exported function that is part
of the external API. It does not appear on functions that are "external"
in the C sense, but which are internal to the library. */
#undef PCRE2_EXP_DEFN])
if test "$enable_ebcdic" = "yes"; then
AC_DEFINE_UNQUOTED([EBCDIC], [], [
If you are compiling for a system that uses EBCDIC instead of ASCII
character codes, define this macro to any value. When EBCDIC is set, PCRE2
assumes that all input strings are in EBCDIC. If you do not define this
macro, PCRE2 will assume input strings are ASCII or UTF-8/16/32 Unicode. It
is not possible to build a version of PCRE2 that supports both EBCDIC and
UTF-8/16/32.])
fi
if test "$enable_ebcdic_nl25" = "yes"; then
AC_DEFINE_UNQUOTED([EBCDIC_NL25], [], [
In an EBCDIC environment, define this macro to any value to arrange for
the NL character to be 0x25 instead of the default 0x15. NL plays the role
that LF does in an ASCII/Unicode environment.])
fi
if test "$enable_valgrind" = "yes"; then
AC_DEFINE_UNQUOTED([SUPPORT_VALGRIND], [], [
Define to any value for valgrind support to find invalid memory reads.])
fi
# Platform specific issues
NO_UNDEFINED=
EXPORT_ALL_SYMBOLS=
case $host_os in
cygwin* | mingw* )
if test X"$enable_shared" = Xyes; then
NO_UNDEFINED="-no-undefined"
EXPORT_ALL_SYMBOLS="-Wl,--export-all-symbols"
fi
;;
esac
# The extra LDFLAGS for each particular library. The libpcre2*_version values
# are m4 variables, assigned above.
EXTRA_LIBPCRE2_8_LDFLAGS="$EXTRA_LIBPCRE2_8_LDFLAGS \
$NO_UNDEFINED -version-info libpcre2_8_version"
EXTRA_LIBPCRE2_16_LDFLAGS="$EXTRA_LIBPCRE2_16_LDFLAGS \
$NO_UNDEFINED -version-info libpcre2_16_version"
EXTRA_LIBPCRE2_32_LDFLAGS="$EXTRA_LIBPCRE2_32_LDFLAGS \
$NO_UNDEFINED -version-info libpcre2_32_version"
EXTRA_LIBPCRE2_POSIX_LDFLAGS="$EXTRA_LIBPCRE2_POSIX_LDFLAGS \
$NO_UNDEFINED -version-info libpcre2_posix_version"
AC_SUBST(EXTRA_LIBPCRE2_8_LDFLAGS)
AC_SUBST(EXTRA_LIBPCRE2_16_LDFLAGS)
AC_SUBST(EXTRA_LIBPCRE2_32_LDFLAGS)
AC_SUBST(EXTRA_LIBPCRE2_POSIX_LDFLAGS)