mirror of
https://gitlab.freedesktop.org/libbsd/libbsd.git
synced 2025-01-09 03:08:38 +01:00
31f034e386
Switch from the previous versioned symbol implementation which required users to also link against the message digest provider explicitly, or they would fail to find the symbols, to an implementation that loads the symbols from the linked library providing the functions using dlsym(), thus preserving backwards compatibility.
230 lines
6.3 KiB
Plaintext
230 lines
6.3 KiB
Plaintext
# Process this file with autoconf to produce a configure script.
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AC_PREREQ([2.67])
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AC_INIT([libbsd], m4_esyscmd([./get-version]), [libbsd@lists.freedesktop.org])
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AC_CONFIG_SRCDIR([src/strlcpy.c])
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AC_CONFIG_AUX_DIR([build-aux])
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AC_CONFIG_MACRO_DIR([m4])
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AM_INIT_AUTOMAKE([1.9 foreign nostdinc subdir-objects no-dist-gzip dist-xz])
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m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])],
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[AC_SUBST([AM_DEFAULT_VERBOSITY], [1])])
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LIBBSD_ABI_MAJOR=0
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LIBBSD_ABI_MINOR=11
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LIBBSD_ABI_PATCH=2
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LIBBSD_ABI="$LIBBSD_ABI_MAJOR:$LIBBSD_ABI_MINOR:$LIBBSD_ABI_PATCH"
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AC_SUBST([LIBBSD_ABI])
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# Check and store if we got user supplied variables
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user_CFLAGS=${CFLAGS-unset}
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# Checks for operating system services and capabilities.
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AC_USE_SYSTEM_EXTENSIONS
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AC_SYS_LARGEFILE
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LT_INIT
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AC_CACHE_CHECK([if ld supports --version-script flag],
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[libbsd_cv_version_script], [
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echo "{ global: symbol; local: *; };" >conftest.map
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save_LDFLAGS=$LDFLAGS
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LDFLAGS="$LDFLAGS -Wl,--version-script=conftest.map"
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AC_LINK_IFELSE([
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AC_LANG_PROGRAM([], [])
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], [
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libbsd_cv_version_script=yes
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], [
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libbsd_cv_version_script=no
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])
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LDFLAGS="$save_LDFLAGS"
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rm -f conftest.map
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]
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)
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AM_CONDITIONAL([HAVE_LINKER_VERSION_SCRIPT],
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[test "x$libbsd_cv_version_script" = "xyes"])
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# Checks for programs.
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AC_PROG_CC
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AC_PROG_INSTALL
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AC_PROG_LN_S
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# Set default compiler variables
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if test "$user_CFLAGS" = unset && test "$GCC" = yes; then
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CFLAGS="$CFLAGS -Wall -Wextra -Wno-unused-variable -Wno-unused-parameter"
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fi
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# Checks for libraries.
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AC_CHECK_LIB([testu01], [unif01_CreateExternGenBits],
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[TESTU01_LIBS="-ltestu01"])
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AC_SUBST([TESTU01_LIBS])
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AM_CONDITIONAL([HAVE_LIBTESTU01],
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[test "x$ac_cv_lib_testu01_unif01_CreateExternGenBits" = "xyes"])
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saved_LIBS="$LIBS"
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AC_SEARCH_LIBS([dlsym], [dl], [
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AS_IF([test "x$ac_cv_search_dlsym" != "xnone required"], [
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LIBBSD_LIBS="$LIBBSD_LIBS $ac_cv_search_dlsym"
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])
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], [
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AC_MSG_ERROR([cannot find required dlsym function])
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])
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AC_SEARCH_LIBS([MD5Update], [md], [
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AS_IF([test "x$ac_cv_search_MD5Update" != "xnone required"], [
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LIBBSD_LIBS="$LIBBSD_LIBS $ac_cv_search_MD5Update"
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])
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], [
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AC_MSG_ERROR([cannot find required MD5 functions in libc or libmd])
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])
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AC_SEARCH_LIBS([SHA512Update], [md], [
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AS_IF([test "x$ac_cv_search_SHA512Update" != "xnone required"], [
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LIBBSD_LIBS="$LIBBSD_LIBS $ac_cv_search_SHA512Update"
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])
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], [
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AC_MSG_ERROR([cannot find required SHA-2 functions in libc or libmd])
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])
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LIBS="$saved_LIBS"
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is_windows=no
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AS_CASE([$host_os],
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[*-gnu*], [
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# In old glibc versions (< 2.17) clock_gettime() is in librt.
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saved_LIBS="$LIBS"
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AC_SEARCH_LIBS([clock_gettime], [rt], [
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AS_IF([test "x$ac_cv_search_clock_gettime" != "xnone required"], [
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LIBBSD_LIBS="$LIBBSD_LIBS $ac_cv_search_clock_gettime"
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])
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])
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LIBS="$saved_LIBS"
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],
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[*-musl*], [
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# Upstream refuses to define this, we will do it ourselves then.
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AC_DEFINE([__MUSL__], [1], [Define to 1 if we are building for musl])
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],
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[mingw*], [
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is_windows=yes
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],
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)
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AM_CONDITIONAL([OS_WINDOWS], [test "x$is_windows" = "xyes"])
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# Checks for header files.
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AC_CHECK_HEADERS([sys/ndir.h sys/dir.h ndir.h dirent.h pwd.h grp.h])
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# Checks for typedefs, structures, and compiler characteristics.
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AC_C_INLINE
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AC_C_TYPEOF
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AC_TYPE_INT64_T
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AC_TYPE_MODE_T
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AC_TYPE_OFF_T
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AC_TYPE_PID_T
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AC_TYPE_UID_T
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AC_TYPE_SIZE_T
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AC_TYPE_SSIZE_T
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AC_CHECK_DECL([F_CLOSEM],
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[AC_DEFINE([HAVE_FCNTL_CLOSEM], [1],
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[Define to 1 if you have fcntl(F_CLOSEM)])],
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[],
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[#include <limits.h>
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#include <fcntl.h>])
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AC_CACHE_CHECK(
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[for GNU .init_array section support],
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[libbsd_cv_gnu_init_array_support],
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[AC_RUN_IFELSE(
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[AC_LANG_SOURCE(
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[[
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static int rc = 1;
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static void init(int argc) { if (argc == 1) rc = 0; }
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void (*init_func)(int argc) __attribute__((__section__(".init_array"))) = init;
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int main() { return rc; }
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]]
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)],
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[libbsd_cv_gnu_init_array_support=yes],
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[libbsd_cv_gnu_init_array_support=no],
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[AC_PREPROC_IFELSE(
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[AC_LANG_SOURCE(
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[[
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/* Look for a known libc that supports .init_array with the GNU extension
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* to pass main() arguments to the init functions. */
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#include <stdlib.h>
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#if defined __GLIBC_PREREQ
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# if __GLIBC_PREREQ(2, 4)
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/* glibc supports GNU .init_array since 2.4. */
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# else
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# error glibc does not support GNU .init_array
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# endif
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#else
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/*
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* Basic SysV ABI .init_array support, init functions do not get arguments:
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* - Bionic since its inception.
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* - uClibc since 0.9.29.
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*/
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# error unknown whether libc supports GNU .init_array
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#endif
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]]
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)],
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[libbsd_cv_gnu_init_array_support=yes],
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[libbsd_cv_gnu_init_array_support=no])
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]
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)]
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)
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AM_CONDITIONAL([BUILD_LIBBSD_CTOR],
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[test "$libbsd_cv_gnu_init_array_support" = yes])
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# Checks for library functions.
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AC_MSG_CHECKING([for program_invocation_short_name])
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AC_LINK_IFELSE(
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[AC_LANG_PROGRAM([[#include <errno.h>]],
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[[const char *p = program_invocation_short_name;]])],
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[AC_DEFINE([HAVE_PROGRAM_INVOCATION_SHORT_NAME], [1],
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[Define to 1 if you have program_invocation_short_name])
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AC_MSG_RESULT([yes])],
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[AC_MSG_RESULT([no])])
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AC_MSG_CHECKING([for __progname])
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AC_LINK_IFELSE(
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[AC_LANG_PROGRAM([[extern char *__progname;]],
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[[printf("%s", __progname);]])],
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[AC_DEFINE([HAVE___PROGNAME], [1], [Define to 1 if you have __progname])
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AC_MSG_RESULT([yes])],
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[AC_MSG_RESULT([no])])
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AC_MSG_CHECKING([for __register_atfork])
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AC_LINK_IFELSE(
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[AC_LANG_PROGRAM([[
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#include <stddef.h>
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extern void *__dso_handle;
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extern int __register_atfork(void (*)(void), void(*)(void), void (*)(void), void *);
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]], [[
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__register_atfork(NULL, NULL, NULL, __dso_handle);
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]])],
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[AC_DEFINE([HAVE___REGISTER_ATFORK], [1],
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[Define to 1 if you have __register_atfork])
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AC_MSG_RESULT([yes])],
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[LIBBSD_LIBS="$LIBBSD_LIBS -pthread"
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AC_MSG_RESULT([no])
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])
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AC_CHECK_FUNCS([clearenv dirfd fopencookie __fpurge \
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getauxval getentropy getexecname getline \
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pstat_getproc sysconf])
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AM_CONDITIONAL([HAVE_GETENTROPY], [test "x$ac_cv_func_getentropy" = "xtrue"])
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AC_SUBST([LIBBSD_LIBS])
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AC_CONFIG_FILES([
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Makefile
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include/Makefile
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man/Makefile
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src/Makefile
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src/libbsd.pc
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src/libbsd-ctor.pc
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src/libbsd-overlay.pc
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test/Makefile
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])
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AC_CONFIG_HEADERS([config.h])
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AC_OUTPUT
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