Check for -fstack-protector
Not all toolchains provide support for -fstack-protector. This patch
provides a configure check to avoid build errors like
/home/buildroot/buildroot/output/host/opt/ext-toolchain/bin/../lib/gcc/x86_64-buildroot-linux-uclibc/6.4.0/../../../../x86_64-buildroot-linux-uclibc/bin/ld: cannot find -lssp_nonshared
/home/buildroot/buildroot/output/host/opt/ext-toolchain/bin/../lib/gcc/x86_64-buildroot-linux-uclibc/6.4.0/../../../../x86_64-buildroot-linux-uclibc/bin/ld: cannot find -lssp
diff --git a/configure.ac b/configure.ac
index 9b64683..c305d63 100644
--- a/configure.ac
+++ b/configure.ac
@@ -129,6 +129,22 @@
[Defined to 1 if GCC visibility attribute is supported])
fi
+# Check for -fstack-protector
+ssp_cc=yes
+if test "X$CC-cc" != "X"; then
+ AC_MSG_CHECKING([whether ${CC-cc} accepts -fstack-protector])
+ ssp_old_cflags="$CFLAGS"
+ CFLAGS="$CFLAGS -fstack-protector"
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[alloca(100);]])], [], [ssp_cc=no])
+ AC_MSG_RESULT([$ssp_cc])
+ if test "X$ssp_cc" = "Xno"; then
+ CFLAGS="$ssp_old_cflags"
+ else
+ AC_DEFINE([ENABLE_SSP_CC], 1, [Define if SSP C support is enabled.])
+ fi
+fi
+AM_CONDITIONAL(USE_SSP, test "$ssp_cc" = "yes")
+
# Check for DRM (mandatory)
LIBDRM_VERSION=libdrm_version
PKG_CHECK_MODULES([DRM], [libdrm >= $LIBDRM_VERSION])
diff --git a/decode/Makefile.am b/decode/Makefile.am
index febc50d..8ea9252 100644
--- a/decode/Makefile.am
+++ b/decode/Makefile.am
@@ -24,11 +24,14 @@
AM_CPPFLAGS = \
-Wall \
- -fstack-protector \
$(LIBVA_CFLAGS) \
-I$(top_srcdir)/common \
$(NULL)
+if USE_SSP
+AM_CPPFLAGS += -fstack-protector
+endif
+
TEST_LIBS = \
$(LIBVA_LIBS) \
$(top_builddir)/common/libva-display.la \
diff --git a/encode/Makefile.am b/encode/Makefile.am
index ab1a86f..7396352 100644
--- a/encode/Makefile.am
+++ b/encode/Makefile.am
@@ -25,10 +25,13 @@
AM_CPPFLAGS = \
-Wall \
- -fstack-protector \
$(LIBVA_CFLAGS) \
$(NULL)
+if USE_SSP
+AM_CPPFLAGS += -fstack-protector
+endif
+
h264encode_SOURCES = h264encode.c
h264encode_CFLAGS = -I$(top_srcdir)/common -g
h264encode_LDADD = \
diff --git a/putsurface/Makefile.am b/putsurface/Makefile.am
index e7b62a1..10ae63e 100644
--- a/putsurface/Makefile.am
+++ b/putsurface/Makefile.am
@@ -26,9 +26,12 @@
$(LIBVA_CFLAGS) \
-I$(top_srcdir)/common \
-Wall \
- -fstack-protector \
$(NULL)
+if USE_SSP
+TEST_CFLAGS += -fstack-protector
+endif
+
TEST_LIBS = \
$(LIBVA_LIBS) \
$(top_builddir)/common/libva-display.la \
diff --git a/vainfo/Makefile.am b/vainfo/Makefile.am
index aff201f..e59f466 100644
--- a/vainfo/Makefile.am
+++ b/vainfo/Makefile.am
@@ -27,9 +27,12 @@
$(LIBVA_CFLAGS) \
-DLIBVA_VERSION_S="\"$(LIBVA_VERSION)\"" \
-Wall \
- -fstack-protector \
$(NULL)
+if USE_SSP
+vainfo_cflags += -fstack-protector
+endif
+
vainfo_libs = \
$(LIBVA_LIBS) \
$(top_builddir)/common/libva-display.la \
diff --git a/videoprocess/Makefile.am b/videoprocess/Makefile.am
index cbb44a3..0c52763 100644
--- a/videoprocess/Makefile.am
+++ b/videoprocess/Makefile.am
@@ -24,11 +24,14 @@
AM_CPPFLAGS = \
-Wall \
- -fstack-protector \
$(LIBVA_CFLAGS) \
-I$(top_srcdir)/common \
$(NULL)
+if USE_SSP
+AM_CPPFLAGS += -fstack-protector
+endif
+
TEST_LIBS = \
$(LIBVA_LIBS) \
$(top_builddir)/common/libva-display.la \
