From 69f87967892d1ff4b7396edd80dfbc13f5012b2e Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Tue, 14 Dec 2021 23:01:02 +0300
Subject: [PATCH] autotools: support for visibility attributes for relevant
targets.
---
configure | 86 ++++++++++++++++++++++++++++++++++++++++------------
configure.ac | 31 +++++++++++++++++++
2 files changed, 97 insertions(+), 20 deletions(-)
diff --git a/configure b/configure
index 7bc99c6..0c38fb1 100755
--- a/configure
+++ b/configure
@@ -4013,13 +4013,13 @@ if ${lt_cv_nm_interface+:} false; then :
else
lt_cv_nm_interface="BSD nm"
echo "int some_variable = 0;" > conftest.$ac_ext
- (eval echo "\"\$as_me:4012: $ac_compile\"" >&5)
+ (eval echo "\"\$as_me:4016: $ac_compile\"" >&5)
(eval "$ac_compile" 2>conftest.err)
cat conftest.err >&5
- (eval echo "\"\$as_me:4015: $NM \\\"conftest.$ac_objext\\\"\"" >&5)
+ (eval echo "\"\$as_me:4019: $NM \\\"conftest.$ac_objext\\\"\"" >&5)
(eval "$NM \"conftest.$ac_objext\"" 2>conftest.err > conftest.out)
cat conftest.err >&5
- (eval echo "\"\$as_me:4018: output\"" >&5)
+ (eval echo "\"\$as_me:4022: output\"" >&5)
cat conftest.out >&5
if $GREP 'External.*some_variable' conftest.out > /dev/null; then
lt_cv_nm_interface="MS dumpbin"
@@ -5233,7 +5233,7 @@ ia64-*-hpux*)
;;
*-*-irix6*)
# Find out which ABI we are using.
- echo '#line 5232 "configure"' > conftest.$ac_ext
+ echo '#line 5236 "configure"' > conftest.$ac_ext
if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
(eval $ac_compile) 2>&5
ac_status=$?
@@ -7058,11 +7058,11 @@ else
-e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
-e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
-e 's:$: $lt_compiler_flag:'`
- (eval echo "\"\$as_me:7057: $lt_compile\"" >&5)
+ (eval echo "\"\$as_me:7061: $lt_compile\"" >&5)
(eval "$lt_compile" 2>conftest.err)
ac_status=$?
cat conftest.err >&5
- echo "$as_me:7061: \$? = $ac_status" >&5
+ echo "$as_me:7065: \$? = $ac_status" >&5
if (exit $ac_status) && test -s "$ac_outfile"; then
# The compiler can only warn and ignore the option if not recognized
# So say no if there are warnings other than the usual output.
@@ -7407,11 +7407,11 @@ else
-e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
-e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
-e 's:$: $lt_compiler_flag:'`
- (eval echo "\"\$as_me:7406: $lt_compile\"" >&5)
+ (eval echo "\"\$as_me:7410: $lt_compile\"" >&5)
(eval "$lt_compile" 2>conftest.err)
ac_status=$?
cat conftest.err >&5
- echo "$as_me:7410: \$? = $ac_status" >&5
+ echo "$as_me:7414: \$? = $ac_status" >&5
if (exit $ac_status) && test -s "$ac_outfile"; then
# The compiler can only warn and ignore the option if not recognized
# So say no if there are warnings other than the usual output.
@@ -7512,11 +7512,11 @@ else
-e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
-e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
-e 's:$: $lt_compiler_flag:'`
- (eval echo "\"\$as_me:7511: $lt_compile\"" >&5)
+ (eval echo "\"\$as_me:7515: $lt_compile\"" >&5)
(eval "$lt_compile" 2>out/conftest.err)
ac_status=$?
cat out/conftest.err >&5
- echo "$as_me:7515: \$? = $ac_status" >&5
+ echo "$as_me:7519: \$? = $ac_status" >&5
if (exit $ac_status) && test -s out/conftest2.$ac_objext
then
# The compiler can only warn and ignore the option if not recognized
@@ -7567,11 +7567,11 @@ else
-e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
-e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
-e 's:$: $lt_compiler_flag:'`
- (eval echo "\"\$as_me:7566: $lt_compile\"" >&5)
+ (eval echo "\"\$as_me:7570: $lt_compile\"" >&5)
(eval "$lt_compile" 2>out/conftest.err)
ac_status=$?
cat out/conftest.err >&5
- echo "$as_me:7570: \$? = $ac_status" >&5
+ echo "$as_me:7574: \$? = $ac_status" >&5
if (exit $ac_status) && test -s out/conftest2.$ac_objext
then
# The compiler can only warn and ignore the option if not recognized
@@ -10010,7 +10010,7 @@ else
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<_LT_EOF
-#line 10009 "configure"
+#line 10013 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
@@ -10106,7 +10106,7 @@ else
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<_LT_EOF
-#line 10105 "configure"
+#line 10109 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
@@ -14289,11 +14289,11 @@ else
-e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
-e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
-e 's:$: $lt_compiler_flag:'`
- (eval echo "\"\$as_me:14288: $lt_compile\"" >&5)
+ (eval echo "\"\$as_me:14292: $lt_compile\"" >&5)
(eval "$lt_compile" 2>conftest.err)
ac_status=$?
cat conftest.err >&5
- echo "$as_me:14292: \$? = $ac_status" >&5
+ echo "$as_me:14296: \$? = $ac_status" >&5
if (exit $ac_status) && test -s "$ac_outfile"; then
# The compiler can only warn and ignore the option if not recognized
# So say no if there are warnings other than the usual output.
@@ -14388,11 +14388,11 @@ else
-e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
-e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
-e 's:$: $lt_compiler_flag:'`
- (eval echo "\"\$as_me:14387: $lt_compile\"" >&5)
+ (eval echo "\"\$as_me:14391: $lt_compile\"" >&5)
(eval "$lt_compile" 2>out/conftest.err)
ac_status=$?
cat out/conftest.err >&5
- echo "$as_me:14391: \$? = $ac_status" >&5
+ echo "$as_me:14395: \$? = $ac_status" >&5
if (exit $ac_status) && test -s out/conftest2.$ac_objext
then
# The compiler can only warn and ignore the option if not recognized
@@ -14440,11 +14440,11 @@ else
-e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
-e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
-e 's:$: $lt_compiler_flag:'`
- (eval echo "\"\$as_me:14439: $lt_compile\"" >&5)
+ (eval echo "\"\$as_me:14443: $lt_compile\"" >&5)
(eval "$lt_compile" 2>out/conftest.err)
ac_status=$?
cat out/conftest.err >&5
- echo "$as_me:14443: \$? = $ac_status" >&5
+ echo "$as_me:14447: \$? = $ac_status" >&5
if (exit $ac_status) && test -s out/conftest2.$ac_objext
then
# The compiler can only warn and ignore the option if not recognized
@@ -15666,6 +15666,50 @@ case "$host" in
esac
+CheckVisibilityHidden()
+{
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking for GCC -fvisibility=hidden option" >&5
+$as_echo_n "checking for GCC -fvisibility=hidden option... " >&6; }
+ have_gcc_fvisibility=no
+ case "$host" in
+ *-*-cygwin* | *-*-mingw* | *-*-os2*)
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: ignored for $host_os" >&5
+$as_echo "ignored for $host_os" >&6; }
+ return
+ ;;
+ esac
+
+ visibility_CFLAGS="-fvisibility=hidden"
+ save_CFLAGS="$CFLAGS"
+ CFLAGS="$save_CFLAGS $visibility_CFLAGS -Werror"
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+ #if !defined(__GNUC__) || __GNUC__ < 4
+ #error SDL only uses visibility attributes in GCC 4 or newer
+ #endif
+
+int
+main ()
+{
+
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+ have_gcc_fvisibility=yes
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: $have_gcc_fvisibility" >&5
+$as_echo "$have_gcc_fvisibility" >&6; }
+ CFLAGS="$save_CFLAGS"
+
+ if test x$have_gcc_fvisibility = xyes; then
+ CFLAGS="$CFLAGS $visibility_CFLAGS"
+ fi
+}
+
SDL_VERSION=2.0.0
@@ -16191,6 +16235,8 @@ else
fi
+CheckVisibilityHidden
+
CXXFLAGS="$CXXFLAGS $CFLAGS"
if test x$enable_shared = xyes; then
diff --git a/configure.ac b/configure.ac
index aa45962..a26f214 100644
--- a/configure.ac
+++ b/configure.ac
@@ -112,6 +112,34 @@ case "$host" in
esac
AC_SUBST(INETLIB)
+dnl See if GCC's -fvisibility=hidden is supported (gcc4 and later, usually).
+CheckVisibilityHidden()
+{
+ AC_MSG_CHECKING(for GCC -fvisibility=hidden option)
+ have_gcc_fvisibility=no
+ case "$host" in
+ *-*-cygwin* | *-*-mingw* | *-*-os2*)
+ AC_MSG_RESULT([ignored for $host_os])
+ return
+ ;;
+ esac
+
+ visibility_CFLAGS="-fvisibility=hidden"
+ save_CFLAGS="$CFLAGS"
+ CFLAGS="$save_CFLAGS $visibility_CFLAGS -Werror"
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+ #if !defined(__GNUC__) || __GNUC__ < 4
+ #error SDL only uses visibility attributes in GCC 4 or newer
+ #endif
+ ]],[])], [have_gcc_fvisibility=yes],[])
+ AC_MSG_RESULT($have_gcc_fvisibility)
+ CFLAGS="$save_CFLAGS"
+
+ if test x$have_gcc_fvisibility = xyes; then
+ CFLAGS="$CFLAGS $visibility_CFLAGS"
+ fi
+}
+
dnl Check for SDL
SDL_VERSION=2.0.0
AC_SUBST(SDL_VERSION)
@@ -140,6 +168,9 @@ http://www.libsdl.org/projects/GUIlib/
fi
AM_CONDITIONAL(HAVE_GUI_LIB, test x$have_GUI = xyes)
+dnl check for GCC visibility attributes
+CheckVisibilityHidden
+
dnl C++ flags are the same as the C flags
CXXFLAGS="$CXXFLAGS $CFLAGS"