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authorCorinna Vinschen <corinna@vinschen.de>2016-03-22 12:25:20 +0300
committerCorinna Vinschen <corinna@vinschen.de>2016-03-22 12:25:20 +0300
commitfe508576ef1f815b22177d7597796886b91ea0c8 (patch)
tree885adbb929453bbbee04db48bdbbafec4e29205e /config/picflag.m4
parent445036bb9882485133750a14a5b3da30efeae2df (diff)
Sync toplevel with upstream GCC.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Diffstat (limited to 'config/picflag.m4')
-rw-r--r--config/picflag.m415
1 files changed, 9 insertions, 6 deletions
diff --git a/config/picflag.m4 b/config/picflag.m4
index 2ee5cd078..2f5b9721e 100644
--- a/config/picflag.m4
+++ b/config/picflag.m4
@@ -7,9 +7,15 @@ AC_DEFUN([_GCC_PICFLAG], [
case "${$2}" in
# PIC is the default on some targets or must not be used.
*-*-darwin*)
- # PIC is the default on this platform
- # Common symbols not allowed in MH_DYLIB files
- $1=-fno-common
+ # For darwin, common symbols are not allowed in MH_DYLIB files
+ case "${CFLAGS}" in
+ # If we are using a compiler supporting mdynamic-no-pic
+ # and the option has been tested as safe to add, then cancel
+ # it here, since the code generated is incompatible with shared
+ # libs.
+ *-mdynamic-no-pic*) $1='-fno-common -mno-dynamic-no-pic' ;;
+ *) $1=-fno-common ;;
+ esac
;;
alpha*-dec-osf5*)
# PIC is the default.
@@ -50,9 +56,6 @@ case "${$2}" in
i[[34567]]86-*-* | x86_64-*-*)
$1=-fpic
;;
- m68k-*-*)
- $1=-fpic
- ;;
# FIXME: Override -fPIC default in libgcc only?
sh-*-linux* | sh[[2346lbe]]*-*-linux*)
$1=-fpic