[PATCH 21.4] Problem with gcc 5.3 changes

Hi,

With gcc 5.3 some compatibility problems are introduced for which the 21.4
code is not prepared to handle. See the gentoo bug report

    https://bugs.gentoo.org/show_bug.cgi?id=576512

for some details. This debian bug report is also of interest:

    https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=778180

>From that I have compiled this patch.


diff -r e2da872593c0 configure.in
--- a/configure.in	Tue Mar 24 22:15:53 2015 -0400
+++ b/configure.in	Sun Mar 13 13:48:24 2016 +0100
@@ -1939,6 +1939,8 @@
     CFLAGS="-g -O3 -Wall -Wno-switch -Winline -Wmissing-prototypes"
     dnl Yuck, bad compares have been worth at least 3 crashes!
     CFLAGS="$CFLAGS -Wsign-compare"
+    dnl Use old gnu inline semantics until we fix the source
+    CFLAGS="$CFLAGS -fgnu89-inline"
     dnl XEmacs is known not to be strict-aliasing-safe.
     case "`gcc -v --help 2>&1`" in
       *-fstrict-aliasing* ) CFLAGS="$CFLAGS -fno-strict-aliasing" ;;
diff -r e2da872593c0 src/lisp.h
--- a/src/lisp.h	Tue Mar 24 22:15:53 2015 -0400
+++ b/src/lisp.h	Sun Mar 13 13:48:24 2016 +0100
@@ -193,6 +193,8 @@
 # endif /* GNUC */
 #endif
 
+#ifndef _GCC_MAX_ALIGN_T
+#define _GCC_MAX_ALIGN_T
 /* No type has a greater alignment requirement than max_align_t.
    (except perhaps for types we don't use, like long double) */
 typedef union
@@ -202,6 +204,7 @@
   struct { void (*f)(void); } f;
   struct { double d; } d;
 } max_align_t;
+#endif
 
 #ifndef ALIGNOF
 # if defined (__GNUC__) && (__GNUC__ >= 2)


Yours Mats