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diff --git a/configure.ac b/configure.ac
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index 878284d..9e2ba4d 100644
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--- a/configure.ac
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+++ b/configure.ac
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@@ -214,21 +214,46 @@ AC_SEARCH_LIBS([dlopen], [dl], [], [
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AC_MSG_ERROR([unable to find the dlopen() function])
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])
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-# Check for -fstack-protector
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-ssp_cc=yes
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+# Check for -fstack-protector and -fstack-protector-strong
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+SSP_CC_FLAG=""
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if test "X$CC-cc" != "X"; then
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- AC_MSG_CHECKING([whether ${CC-cc} accepts -fstack-protector])
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+ # Do not duplicate options in CFLAGS
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+ ssp_sp_set=no
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+ ssp_sps_set=no
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+ for ssp_x in $CFLAGS; do
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+ case "X$ssp_x" in
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+ X-fstack-protector) ssp_sp_set=yes ;;
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+ X-fstack-protector-strong) ssp_sps_set=yes ;;
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+ esac
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+ done
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ssp_old_cflags="$CFLAGS"
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- CFLAGS="$CFLAGS -fstack-protector"
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- AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[alloca(100);]])], [], [ssp_cc=no])
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+ # Prefer -fstack-protector-strong over -fstack-protector
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+ if test "X$ssp_sps_set" = "Xno"; then
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+ SSP_CC_FLAG="-fstack-protector-strong"
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+ fi
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+ AC_MSG_CHECKING([whether ${CC-cc} accepts -fstack-protector-strong])
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+ CFLAGS="$ssp_old_cflags $SSP_CC_FLAG"
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+ AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[alloca(100);]])], [ssp_cc=yes], [ssp_cc=no])
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AC_MSG_RESULT([$ssp_cc])
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if test "X$ssp_cc" = "Xno"; then
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- CFLAGS="$ssp_old_cflags"
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- else
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+ # Fallback to -fstack-protector
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+ if test "X$ssp_sp_set" = "Xno"; then
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+ SSP_CC_FLAG="-fstack-protector"
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+ fi
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+ AC_MSG_CHECKING([whether ${CC-cc} accepts -fstack-protector])
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+ CFLAGS="$ssp_old_cflags $SSP_CC_FLAG"
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+ AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[alloca(100);]])], [ssp_cc=yes], [ssp_cc=no])
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+ AC_MSG_RESULT([$ssp_cc])
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+ if test "X$ssp_cc" = "Xno"; then
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+ SSP_CC_FLAG=""
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+ fi
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+ fi
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+ CFLAGS="$ssp_old_cflags $SSP_CC_FLAG"
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+ if test "X$ssp_cc" = "Xyes"; then
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AC_DEFINE([ENABLE_SSP_CC], 1, [Define if SSP C support is enabled.])
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fi
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fi
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-AM_CONDITIONAL(USE_SSP, test "$ssp_cc" = "yes")
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+AC_SUBST(SSP_CC_FLAG)
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# Check for DRM (mandatory)
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LIBDRM_VERSION=libdrm_version
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diff --git a/va/Makefile.am b/va/Makefile.am
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index 0d8eff1..5ee49c4 100644
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--- a/va/Makefile.am
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+++ b/va/Makefile.am
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@@ -83,9 +83,7 @@ libva_cflags = \
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-Wall \
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$(NULL)
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93f5fa |
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-if USE_SSP
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-libva_cflags += -fstack-protector
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-endif
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+libva_cflags += $(SSP_CC_FLAG)
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93f5fa |
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lib_LTLIBRARIES = libva.la
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libvaincludedir = ${includedir}/va
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