multimedia/gstreamer1-libav: switch to ffmpeg 4.0 alignment fix

Obtained from: upstream
2018-11-11 19:49:37 +00:00
parent 8eef9aa030
commit 27babe3264
1 changed files with 37 additions and 5 deletions
--- a/multimedia/gstreamer1-libav/files/patch-gst-libs_ext_libav_configure
+++ b/multimedia/gstreamer1-libav/files/patch-gst-libs_ext_libav_configure
@@ -14,12 +14,44 @@
 cpu="generic"
 intrinsics="none"
 
-@@ -6492,6 +6487,9 @@ elif enabled llvm_gcc; then
- elif enabled clang; then
-     check_cflags -mllvm -stack-alignment=16
-     check_cflags -mstack-alignment=16
+@@ -6487,11 +6482,39 @@ elif enabled gcc; then
+     check_cflags -Wformat
+     check_cflags -fdiagnostics-color=auto
+     enabled extra_warnings || check_disable_warning -Wno-maybe-uninitialized
 +    if enabled x86_32; then
-+      check_cflags -mstackrealign
+        case $target_os in
+        *bsd*)
+            # BSDs don't guarantee a 16 byte aligned stack, but we can
+            # request GCC to try to maintain 16 byte alignment throughout
+            # function calls. Library entry points that might call assembly
+            # functions align the stack. (The parameter means 2^4 bytes.)
+            check_cflags -mpreferred-stack-boundary=4
+            ;;
+        esac
+    fi
+ elif enabled llvm_gcc; then
+     check_cflags -mllvm -stack-alignment=16
+ elif enabled clang; then
+-    check_cflags -mllvm -stack-alignment=16
+-    check_cflags -mstack-alignment=16
+    if enabled x86_32; then
+        # Clang doesn't support maintaining alignment without assuming the
+        # same alignment in every function. If 16 byte alignment would be
+        # enabled, one would also have to either add attribute_align_arg on
+        # every single entry point into the libraries or enable -mstackrealign
+        # (doing stack realignment in every single function).
+        case $target_os in
+        mingw32|win32|*bsd*)
+            disable aligned_stack
+            ;;
+        *)
+            check_cflags -mllvm -stack-alignment=16
+            check_cflags -mstack-alignment=16
+            ;;
+        esac
+    else
+        check_cflags -mllvm -stack-alignment=16
+        check_cflags -mstack-alignment=16
 +    fi
     check_cflags -Qunused-arguments
     check_cflags -Werror=implicit-function-declaration