mirror of
https://gitlab.freedesktop.org/libbsd/libbsd.git
synced 2025-01-09 03:08:38 +01:00
25d35625eb
To be able to rework the md5 deprecation logic, we need to detangle when we depend on libmd due to requiring MD5 functions, which might be otherwise provided by libc, or when we require SHA functions for the internal getentropy() implementation.
268 lines
8.0 KiB
Plaintext
268 lines
8.0 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=3
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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_SED
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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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AS_IF([test "$user_CFLAGS" = unset], [
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LIBBSD_CHECK_COMPILER_FLAG([-Wall])
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LIBBSD_CHECK_COMPILER_FLAG([-Wextra])
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LIBBSD_CHECK_COMPILER_FLAG([-Wbad-function-cast])
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LIBBSD_CHECK_COMPILER_FLAG([-Wc99-c11-compat])
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LIBBSD_CHECK_COMPILER_FLAG([-Wcast-align])
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LIBBSD_CHECK_COMPILER_FLAG([-Wdeclaration-after-statement])
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LIBBSD_CHECK_COMPILER_FLAG([-Wdocumentation])
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LIBBSD_CHECK_COMPILER_FLAG([-Wduplicated-branches])
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LIBBSD_CHECK_COMPILER_FLAG([-Wduplicated-cond])
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LIBBSD_CHECK_COMPILER_FLAG([-Wformat -Wformat-security])
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LIBBSD_CHECK_COMPILER_FLAG([-Wformat=2])
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LIBBSD_CHECK_COMPILER_FLAG([-Winit-self])
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LIBBSD_CHECK_COMPILER_FLAG([-Wlogical-not-parentheses])
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LIBBSD_CHECK_COMPILER_FLAG([-Wlogical-op])
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LIBBSD_CHECK_COMPILER_FLAG([-Wmissing-declarations])
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LIBBSD_CHECK_COMPILER_FLAG([-Wmissing-format-attribute])
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LIBBSD_CHECK_COMPILER_FLAG([-Wmissing-prototypes])
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LIBBSD_CHECK_COMPILER_FLAG([-Wnested-externs])
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LIBBSD_CHECK_COMPILER_FLAG([-Wno-missing-field-initializers])
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LIBBSD_CHECK_COMPILER_FLAG([-Wno-nonnull-compare])
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LIBBSD_CHECK_COMPILER_FLAG([-Wno-tautological-constant-out-of-range-compare])
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LIBBSD_CHECK_COMPILER_FLAG([-Wno-unused-parameter])
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LIBBSD_CHECK_COMPILER_FLAG([-Wnull-dereference])
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LIBBSD_CHECK_COMPILER_FLAG([-Wold-style-definition])
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LIBBSD_CHECK_COMPILER_FLAG([-Wpointer-arith])
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LIBBSD_CHECK_COMPILER_FLAG([-Wregister])
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LIBBSD_CHECK_COMPILER_FLAG([-Wrestrict])
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LIBBSD_CHECK_COMPILER_FLAG([-Wshadow])
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LIBBSD_CHECK_COMPILER_FLAG([-Wshift-negative-value])
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LIBBSD_CHECK_COMPILER_FLAG([-Wsizeof-array-argument])
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LIBBSD_CHECK_COMPILER_FLAG([-Wstrict-prototypes])
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LIBBSD_CHECK_COMPILER_FLAG([-Wswitch-bool])
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LIBBSD_CHECK_COMPILER_FLAG([-Wvla])
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LIBBSD_CHECK_COMPILER_FLAG([-Wwrite-strings])
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CFLAGS="$CFLAGS $LIBBSD_COMPILER_FLAGS"
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])
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# Checks for libraries.
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AC_CHECK_LIB([testu01], [unif01_CreateExternGenBits],
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[TESTU01_LIBS="-ltestu01"])
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AC_SUBST([TESTU01_LIBS])
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AM_CONDITIONAL([HAVE_LIBTESTU01],
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[test "x$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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MD5_LIBS="$MD5_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"), __used__)) = 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([MD5_LIBS])
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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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