g++ heavy shoveling

Message-ID: <44CFC1EA.2050702@iki.fi>

p4raw-id: //depot/perl@28645

diff --git a/cflags.SH b/cflags.SH
index 6c7c4c9..c32d5f8 100755 (executable)
--- a/cflags.SH
+++ b/cflags.SH
@@ -88,6 +88,20 @@ Intel*) ;; # Haven't we been through this already?
     ;;
 esac
 
+# If we have g++, we cannot have the -Wdeclaration-after-statement.
+# Some g++s accept it but then whine about it with every file.
+case "$cc" in
+*g++*) warn="`echo $warn|sed 's/-Wdeclaration-after-statement/ /'`" ;;
+esac
+
+extra=''
+
+# C and C++ have different rules for const strings;
+# without the -fno-const-strings g++ cannot handle our habit
+# of mixing char literals and char pointers.
+case "$cc" in
+*g++*) extra="$extra -fno-const-strings" ;;
+esac
 
 stdflags=''
 
@@ -104,6 +118,8 @@ $startsh
 warn="$warn"
 # Extra standardness.
 stdflags="$stdflags"
+# Extra extra.
+extra="$extra"
 
 !GROK!THIS!
 
@@ -217,8 +233,8 @@ if test -f .patch; then
 fi
 
     : Can we perhaps use $ansi2knr here
-    echo "$cc -c -DPERL_CORE $ccflags $stdflags $optimize $warn"
-    eval "$also "'"$cc -DPERL_CORE -c $ccflags $stdflags $optimize $warn"'
+    echo "$cc -c -DPERL_CORE $ccflags $stdflags $optimize $warn $extra"
+    eval "$also "'"$cc -DPERL_CORE -c $ccflags $stdflags $optimize $warn $extra"'
 
     . $TOP/config.sh
 

diff --git a/hints/linux.sh b/hints/linux.sh
index 98bdc9c..f5c400b 100644 (file)
--- a/hints/linux.sh
+++ b/hints/linux.sh
@@ -131,6 +131,7 @@ cat >try.c <<'EOM'
 /* Test for whether ELF binaries are produced */
 #include <fcntl.h>
 #include <stdlib.h>
+#include <unistd.h>
 main() {
        char buffer[4];
        int i=open("a.out",O_RDONLY);
@@ -352,3 +353,14 @@ $define|true|[yY]*)
     libswanted="$*"
     ;;
 esac
+
+# If we are using g++ we must use nm and force ourselves to use
+# the /usr/lib/libc.a (resetting the libc below to an empty string
+# makes Configure to look for the right one) because the symbol
+# scanning tricks of Configure will crash and burn horribly.
+case "$cc" in
+*g++*) usenm=true
+       libc=''
+       ;;
+esac
+

diff --git a/perl.h b/perl.h
index 3c806e3..4f39f41 100644 (file)
--- a/perl.h
+++ b/perl.h
@@ -351,7 +351,10 @@ register struct op *Perl_op asm(stringify(OP_IN_REGISTER));
 #  endif
 #endif
 
-#if defined(PERL_GCC_PEDANTIC)
+/* gcc (-ansi) -pedantic doesn't allow gcc brace groups,
+ * g++ allows them but seems to have problems with them
+ * (insane errors ensue). */
+#if defined(PERL_GCC_PEDANTIC) || (defined(__GNUC__) && defined(__cplusplus))
 #  ifndef PERL_GCC_BRACE_GROUPS_FORBIDDEN
 #    define PERL_GCC_BRACE_GROUPS_FORBIDDEN
 #  endif