sys-devel/gcc: build 5.3.0 with 7.1.0 host

Closes: https://bugs.gentoo.org/631976
Package-Manager: Portage-2.3.10-prefix, Repoman-2.3.3
RepoMan-Options: --force

2 files changed, 112 insertions, 0 deletions

diff --git a/sys-devel/gcc/files/gcc-5.3.0-libc_name_p.patch b/sys-devel/gcc/files/gcc-5.3.0-libc_name_p.patch
new file mode 100644
index 0000000000..e87076b904
--- /dev/null
+++ b/sys-devel/gcc/files/gcc-5.3.0-libc_name_p.patch
@@ -0,0 +1,111 @@
+https://gcc.gnu.org/viewcvs/gcc?view=revision&revision=233572
+
+--- a/gcc/cp/Make-lang.in
++++ b/gcc/cp/Make-lang.in
+@@ -111,7 +111,7 @@ else
+ # deleting the $(srcdir)/cp/cfns.h file.
+ $(srcdir)/cp/cfns.h:
+ endif
+-	gperf -o -C -E -k '1-6,$$' -j1 -D -N 'libc_name_p' -L ANSI-C \
++	gperf -o -C -E -k '1-6,$$' -j1 -D -N 'libc_name_p' -L C++ \
+ 		$(srcdir)/cp/cfns.gperf --output-file $(srcdir)/cp/cfns.h
+ 
+ #
+--- a/gcc/cp/cfns.gperf
++++ b/gcc/cp/cfns.gperf
+@@ -1,3 +1,5 @@ 
++%language=C++
++%define class-name libc_name
+ %{
+ /* Copyright (C) 2000-2015 Free Software Foundation, Inc.
+ 
+@@ -16,14 +18,6 @@ for more details.
+ You should have received a copy of the GNU General Public License
+ along with GCC; see the file COPYING3.  If not see
+ <http://www.gnu.org/licenses/>.  */
+-#ifdef __GNUC__
+-__inline
+-#endif
+-static unsigned int hash (const char *, unsigned int);
+-#ifdef __GNUC__
+-__inline
+-#endif
+-const char * libc_name_p (const char *, unsigned int);
+ %}
+ %%
+ # The standard C library functions, for feeding to gperf; the result is used
+--- a/gcc/cp/cfns.h
++++ b/gcc/cp/cfns.h
+@@ -28,7 +28,7 @@ 
+ #error "gperf generated tables don't work with this execution character set. Please report a bug to <bug-gnu-gperf@gnu.org>."
+ #endif
+ 
+-#line 1 "cfns.gperf"
++#line 3 "cfns.gperf"
+ 
+ /* Copyright (C) 2000-2015 Free Software Foundation, Inc.
+ 
+@@ -47,25 +47,18 @@ for more details.
+ You should have received a copy of the GNU General Public License
+ along with GCC; see the file COPYING3.  If not see
+ <http://www.gnu.org/licenses/>.  */
+-#ifdef __GNUC__
+-__inline
+-#endif
+-static unsigned int hash (const char *, unsigned int);
+-#ifdef __GNUC__
+-__inline
+-#endif
+-const char * libc_name_p (const char *, unsigned int);
+ /* maximum key range = 391, duplicates = 0 */
+ 
+-#ifdef __GNUC__
+-__inline
+-#else
+-#ifdef __cplusplus
+-inline
+-#endif
+-#endif
+-static unsigned int
+-hash (register const char *str, register unsigned int len)
++class libc_name
++{
++private:
++  static inline unsigned int hash (const char *str, unsigned int len);
++public:
++  static const char *libc_name_p (const char *str, unsigned int len);
++};
++
++inline unsigned int
++libc_name::hash (register const char *str, register unsigned int len)
+ {
+   static const unsigned short asso_values[] =
+     {
+@@ -122,14 +115,8 @@ hash (register const char *str, register
+   return hval + asso_values[(unsigned char)str[len - 1]];
+ }
+ 
+-#ifdef __GNUC__
+-__inline
+-#ifdef __GNUC_STDC_INLINE__
+-__attribute__ ((__gnu_inline__))
+-#endif
+-#endif
+ const char *
+-libc_name_p (register const char *str, register unsigned int len)
++libc_name::libc_name_p (register const char *str, register unsigned int len)
+ {
+   enum
+     {
+--- a/gcc/cp/except.c
++++ b/gcc/cp/except.c
+@@ -1040,7 +1040,8 @@ nothrow_libfn_p (const_tree fn)
+      unless the system headers are playing rename tricks, and if
+      they are, we don't want to be confused by them.  */
+   id = DECL_NAME (fn);
+-  return !!libc_name_p (IDENTIFIER_POINTER (id), IDENTIFIER_LENGTH (id));
++  return !!libc_name::libc_name_p (IDENTIFIER_POINTER (id),
++				   IDENTIFIER_LENGTH (id));
+ }
+ 
+ /* Returns nonzero if an exception of type FROM will be caught by a
diff --git a/sys-devel/gcc/gcc-5.3.0.ebuild b/sys-devel/gcc/gcc-5.3.0.ebuild
index b93e50955f..ad35214117 100644
--- a/sys-devel/gcc/gcc-5.3.0.ebuild
+++ b/sys-devel/gcc/gcc-5.3.0.ebuild
@@ -62,6 +62,7 @@ src_prepare() {
 	# make sure 64-bits native targets don't screw up the linker paths
 	#epatch "${FILESDIR}"/4.7.1/solaris-searchpath.patch
 	epatch "${FILESDIR}"/no-libs-for-startfile.patch
+	epatch "${FILESDIR}"/${P}-libc_name_p.patch #631976
 	if use prefix; then
 		epatch "${FILESDIR}"/4.5.2/prefix-search-dirs.patch
 		# try /usr/lib32 in 32bit profile on x86_64-linux (needs