[Mesa-dev] [PATCH] Allow static libstdc++/libgcc linking if selected

[Vivek Das Mohapatra]

Sttaically link gallium modules with libstdc++/libgcc/libgcc_eh
if --enable-static-libstdc++ is passed to ./configure:

---
  configure.ac                        | 38 +++++++++++++++++++++++++++++++++++++
  src/gallium/Automake.inc            |  1 +
  src/gallium/targets/dri/Makefile.am |  1 +
  3 files changed, 40 insertions(+)

diff --git a/configure.ac b/configure.ac
index 90c7737..f10ed66 100644
--- a/configure.ac
+++ b/configure.ac
@@ -705,6 +705,43 @@ AC_ARG_ENABLE([dri],
      [enable_dri="$enableval"],
      [enable_dri=yes])

+AC_ARG_ENABLE([static-libstdc++],
+    [AS_HELP_STRING([--enable-static-libstdc++],
+        [Statically link libstdc++/libgcc @<:@default=disabled@:>@])],
+    [enable_static_libstdc__="$enableval"],
+    [enable_static_libstdc__=no])
+
+dnl Strip out unnecessary dynamic linking in of libstdc++ and libgcc_s for
+dnl DRI modules: they cause problems when loaded by games linked against
+dnl a steam runtime with a different libgcc or libstdc++ version:
+if test x$enable_static_libstdc__ != xno;
+then
+    if test x$enable_dri != xno;
+    then
+AC_MSG_NOTICE([Cleanup libtool C++ postdeps: $postdeps_CXX (enable_dri=$enable_dri)])
+        tmppdcxx=;
+        for x in ${postdeps_CXX};
+        do
+            case $x in
+                -lstdc++) true; ;;
+                -lgcc_s) true; ;;
+                *) tmppdcxx=${tmppdcxx}${tmppdcxx:+ }$x; ;;
+            esac;
+        done;
+        postdeps_CXX="${tmppdcxx}";
+AC_MSG_NOTICE([Cleaned libtool C++ postdeps: $postdeps_CXX])
+    fi;
+    STATIC_STDCPP_LIBS="-l:libgcc.a -l:libgcc_eh.a -l:libstdc++.a";
+    STATIC_STDCPP_LDFLAGS="-static-libgcc -static-libstdc++ \
+                          -l:libgcc.a -l:libstdc++.a \
+                          -Wl,--exclude-libs -Wl,libgcc.a:libstdc++.a";
+else
+    STATIC_STDCPP_LIBS="";
+    STATIC_STDCPP_LDFLAGS="";
+fi
+AC_SUBST([STATIC_STDCPP_LDFLAGS])
+AC_SUBST([STATIC_STDCPP_LIBS])
+
  case "$host_os" in
  linux*)
      dri3_default=yes
@@ -2450,6 +2487,7 @@ echo "        prefix:          $prefix"
  echo "        exec_prefix:     $exec_prefix"
  echo "        libdir:          $libdir"
  echo "        includedir:      $includedir"
+echo "        postdeps_CXX:    $postdeps_CXX"

  dnl API info
  echo ""
diff --git a/src/gallium/Automake.inc b/src/gallium/Automake.inc
index 95aae50..3e13cc7 100644
--- a/src/gallium/Automake.inc
+++ b/src/gallium/Automake.inc
@@ -46,6 +46,7 @@ GALLIUM_TARGET_CFLAGS = \

  GALLIUM_COMMON_LIB_DEPS = \
  	-lm \
+	$(STATIC_STDCPP_LIBS) \
  	$(CLOCK_LIB) \
  	$(PTHREAD_LIBS) \
  	$(DLOPEN_LIBS)
diff --git a/src/gallium/targets/dri/Makefile.am b/src/gallium/targets/dri/Makefile.am
index aaeb950..6bc5458 100644
--- a/src/gallium/targets/dri/Makefile.am
+++ b/src/gallium/targets/dri/Makefile.am
@@ -27,6 +27,7 @@ gallium_dri_la_LDFLAGS = \
  	-shrext .so \
  	-module \
  	-avoid-version \
+	$(STATIC_STDCPP_LDFLAGS) \
  	$(GC_SECTIONS)

  if HAVE_LD_VERSION_SCRIPT
-- 
2.1.4