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build: Refactor linker script detection into a new m4 function

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This commit is contained in:
Guillem Jover 2023-05-26 23:50:10 +02:00
parent d0d8d0197f
commit 30b48ed9ea
2 changed files with 28 additions and 22 deletions
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23
configure.ac
View File

@ -32,28 +32,7 @@ AC_SYS_LARGEFILE
AM_PROG_AR AM_PROG_AR
LT_INIT LT_INIT
LIBBSD_LINKER_VERSION_SCRIPT
AC_CACHE_CHECK([if ld supports --version-script flag],
[libbsd_cv_version_script], [
echo "{ global: symbol; local: *; };" >conftest.map
save_LDFLAGS=$LDFLAGS
LDFLAGS="$LDFLAGS -Wl,--version-script=conftest.map"
AC_LINK_IFELSE([
AC_LANG_PROGRAM([[
extern int symbol(void);
int symbol(void) { return 0; }
]], [[
]])
], [
libbsd_cv_version_script=yes
], [
libbsd_cv_version_script=no
])
LDFLAGS="$save_LDFLAGS"
rm -f conftest.map
])
AM_CONDITIONAL([HAVE_LINKER_VERSION_SCRIPT],
[test "x$libbsd_cv_version_script" = "xyes"])
is_windows=no is_windows=no
AS_CASE([$host_os], AS_CASE([$host_os],

27
m4/libbsd-linker.m4 Normal file
View File

@ -0,0 +1,27 @@
# Copyright © 2019, 2022 Guillem Jover <guillem@hadrons.org>
# LIBBSD_LINKER_VERSION_SCRIPT
# ----------------------------
AC_DEFUN([LIBBSD_LINKER_VERSION_SCRIPT], [
AC_CACHE_CHECK([if ld supports --version-script flag],
[libbsd_cv_version_script], [
echo "{ global: symbol; local: *; };" >conftest.map
save_LDFLAGS=$LDFLAGS
LDFLAGS="$LDFLAGS -Wl,--version-script=conftest.map"
AC_LINK_IFELSE([
AC_LANG_PROGRAM([[
extern int symbol(void);
int symbol(void) { return 0; }
]], [[
]])
], [
libbsd_cv_version_script=yes
], [
libbsd_cv_version_script=no
])
LDFLAGS="$save_LDFLAGS"
rm -f conftest.map
])
AM_CONDITIONAL([HAVE_LINKER_VERSION_SCRIPT],
[test "x$libbsd_cv_version_script" = "xyes"])
])