Reapply majority of r55557 but with the changes to compilation flags
disabled until issues with gcc 4.1 on linux 32-bit are resolved.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55636 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/Makefile.config.in b/Makefile.config.in
index f3a9346..5a0dcd5 100644
--- a/Makefile.config.in
+++ b/Makefile.config.in
@@ -234,6 +234,9 @@
# Do we want to build with position independent code?
ENABLE_PIC := @ENABLE_PIC@
+# Use -fvisibility-inlines-hidden?
+ENABLE_VISIBILITY_INLINES_HIDDEN := @ENABLE_VISIBILITY_INLINES_HIDDEN@
+
# This option tells the Makefiles to produce verbose output.
# It essentially prints the commands that make is executing
#VERBOSE = 1
diff --git a/Makefile.rules b/Makefile.rules
index e99d496..d0d83c0 100644
--- a/Makefile.rules
+++ b/Makefile.rules
@@ -241,6 +241,10 @@
endif
endif
+#ifeq ($(ENABLE_VISIBILITY_INLINES_HIDDEN),1)
+# CXX.Flags += -fvisibility-inlines-hidden
+#endif
+
# IF REQUIRES_EH=1 is specified then don't disable exceptions
ifndef REQUIRES_EH
CXX.Flags += -fno-exceptions
diff --git a/autoconf/configure.ac b/autoconf/configure.ac
index ca160d1..35d017e 100644
--- a/autoconf/configure.ac
+++ b/autoconf/configure.ac
@@ -975,6 +975,8 @@
AC_MSG_ERROR([Prequisites for bindings not satisfied. Fix them or use configure --disable-bindings.])
fi
+dnl Determine if the compiler supports -fvisibility-inlines-hidden.
+AC_CXX_USE_VISIBILITY_INLINES_HIDDEN
dnl===-----------------------------------------------------------------------===
dnl===
diff --git a/autoconf/m4/visibility_inlines_hidden.m4 b/autoconf/m4/visibility_inlines_hidden.m4
new file mode 100644
index 0000000..42ddbe9
--- /dev/null
+++ b/autoconf/m4/visibility_inlines_hidden.m4
@@ -0,0 +1,22 @@
+#
+# Determine if the compiler accepts -fvisibility-inlines-hidden
+#
+# This macro is specific to LLVM.
+#
+AC_DEFUN([AC_CXX_USE_VISIBILITY_INLINES_HIDDEN],
+[AC_CACHE_CHECK([for compiler -fvisibility-inlines-hidden option],
+ [llvm_cv_cxx_visibility_inlines_hidden],
+[ AC_LANG_PUSH([C++])
+ oldcxxflags="$CXXFLAGS"
+ CXXFLAGS="$CXXFLAGS -fvisibility-inlines-hidden"
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM()],
+ [llvm_cv_cxx_visibility_inlines_hidden=yes],[llvm_cv_cxx_visibility_inlines_hidden=no])
+ CXXFLAGS="$oldcxxflags"
+ AC_LANG_POP([C++])
+])
+if test "$llvm_cv_cxx_visibility_inlines_hidden" = yes ; then
+ AC_SUBST([ENABLE_VISIBILITY_INLINES_HIDDEN],[1])
+else
+ AC_SUBST([ENABLE_VISIBILITY_INLINES_HIDDEN],[0])
+fi
+])