Add gcc patch for libbacktrace

ci-build.sh

@@ -63,7 +63,7 @@ export PKGEXT='.pkg.tar.xz'
 
 for package in "${packages[@]}"; do
     execute 'Building binary' makepkg-mingw --noconfirm --noprogressbar --skippgpcheck --syncdeps --rmdeps --cleanbuild
-    MINGW_ARCH=mingw64 execute 'Building source' makepkg-mingw --noconfirm --noprogressbar --allsource
+    MINGW_ARCH=mingw64 execute 'Building source' makepkg-mingw --noconfirm --noprogressbar --skippgpcheck --allsource
     execute 'List output contents' ls -ltr
     execute 'Installing' yes:pacman --noprogressbar --upgrade *.pkg.tar.xz
     execute 'Checking Binaries' find ./pkg -regex ".*\.\(exe\|dll\|a\|pc\)"

mingw-w64-gcc/0150-libbacktrace-seh.patch

@@ -0,0 +1,23 @@
+libgcc/Changelog:
+        * unwind-seh.c (_Unwind_Backtrace): Set the ra and cfa pointers
+        before calling the callback.
+---
+ libgcc/unwind-seh.c | 5 +++++
+ 1 file changed, 5 insertions(+)
+
+diff --git a/libgcc/unwind-seh.c b/libgcc/unwind-seh.c
+index 1a70180cfaa..275d782903a 100644
+--- a/libgcc/unwind-seh.c
++++ b/libgcc/unwind-seh.c
+@@ -466,6 +466,11 @@ _Unwind_Backtrace(_Unwind_Trace_Fn trace,
+ 			    &gcc_context.disp->HandlerData,
+ 			    &gcc_context.disp->EstablisherFrame, NULL);
+
++      /* Set values that the callback can inspect via _Unwind_GetIP
++       * and _Unwind_GetCFA. */
++      gcc_context.ra = ms_context.Rip;
++      gcc_context.cfa = ms_context.Rsp;
++
+       /* Call trace function.  */
+       if (trace (&gcc_context, trace_argument) != _URC_NO_REASON)
+ 	return _URC_FATAL_PHASE1_ERROR;

mingw-w64-gcc/PKGBUILD

@@ -2,6 +2,7 @@
 # Contributor: Alexey Borzenkov <[email protected]>
 # Contributor: Ray Donnelly <[email protected]>
 # Contributor: Renato Silva <[email protected]>
+# Contributor: Kirill Müller <[email protected]>
 # Rtools: Jeroen Ooms <[email protected]>
 
 _realname=gcc
@@ -11,7 +12,7 @@ pkgname=("${MINGW_PACKAGE_PREFIX}-${_realname}"
 pkgver=8.3.0
 _srcver=8.3.0
 #_srcver=8.3.0-RC-20190215
-pkgrel=9501
+pkgrel=9502
 pkgdesc="GCC for the MinGW-w64"
 arch=('any')
 url="https://gcc.gnu.org"
@@ -49,7 +50,8 @@ source=("https://ftp.gnu.org/gnu/gcc/${_realname}-${pkgver}/${_realname}-${pkgve
         0019-gcc-8-branch-Backport-patches-for-std-filesystem-from-master.patch
         0130-libstdc++-in-out.patch
         0140-gcc-8.2.0-diagnostic-color.patch
-        pr88568.patch)
+        pr88568.patch
+        0150-libbacktrace-seh.patch)
 sha256sums=('ea71adc1c3d86330874b8df19611424b143308f0d6612d542472600532c96d2d'
             'SKIP'
             'dea2bbad4967280910559c6a11b865aeec19cab34647fb5894cb498b24b14462'
@@ -67,7 +69,8 @@ sha256sums=('ea71adc1c3d86330874b8df19611424b143308f0d6612d542472600532c96d2d'
             'bf83cbc79de4c86f02664c8a624e26b12f570e3c31116fc7c46ecf655696f9a6'
             'ba2f77db605577d08e4079f08a7a9556c975b5416be8610c5be31e915637feb7'
             'e467f0ac68b349de826c79b00a45c5ad9e7c5a55d06b9b9fa7afd94c597f6376'
-            '4bbcb71f7e9e25af641e7abcb12ea4cd7a5ade3a82739414c65259afcbf21256')
+            '4bbcb71f7e9e25af641e7abcb12ea4cd7a5ade3a82739414c65259afcbf21256'
+            '88c1d65e763e631ad49f9a077ed631f4acac9ef4732e2818ccddaefc883b1811')
 
 _threads="posix"
 
@@ -125,6 +128,11 @@ prepare() {
   apply_patch_with_msg \
     pr88568.patch
 
+  # ensure libbacktrace works with SEH
+  # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96948
+  apply_patch_with_msg \
+    0150-libbacktrace-seh.patch
+
   # do not expect ${prefix}/mingw symlink - this should be superceded by
   # 0005-Windows-Don-t-ignore-native-system-header-dir.patch .. but isn't!
   sed -i 's/${prefix}\/mingw\//${prefix}\//g' configure