Mac support

.github/workflows/build.yml

@@ -13,14 +13,16 @@ jobs:
               OS: 'ubuntu-20.04',
               CFLAGS: '-static -std=gnu89 -m32',
               HOST: 'i386-pc-linux',
-              ARCHIVE_NAME: 'mips-gcc-egcs-2.91.66-linux.tar.gz'
+              ARCHIVE_NAME: 'mips-gcc-egcs-2.91.66-linux.tar.gz',
+              HOST_GCC: 'gcc'
+            }
+          - {
+              OS: 'macos-13',
+              CFLAGS: '-DDARWIN -std=gnu89 -Wno-return-type -Wno-error -Wno-implicit-function-declaration',
+              HOST: 'i386-apple-darwin',
+              ARCHIVE_NAME: 'mips-gcc-egcs-2.91.66-mac.tar.gz',
+              HOST_GCC: 'gcc-13'
             }
-          # - {
-          #     OS: 'macos-latest',
-          #     CFLAGS: '-DDARWIN -std=gnu89 -Wno-return-type -Wno-error -Wno-implicit-function-declaration',
-          #     HOST: 'i386-apple-darwin',
-          #     ARCHIVE_NAME: 'mips-gcc-egcs-2.91.66-mac.tar.gz'
-          #   }
 
     name: Building gcc for ${{ matrix.TARGET.OS }}
     steps:
@@ -35,13 +37,14 @@ jobs:
       - name: Configure for mips
         shell: bash
         run: |
-          ./configure --target=mips-linux --prefix=/opt/cross --with-gnu-as --disable-gprof --disable-gdb --disable-werror --host=${{ matrix.TARGET.HOST }} --build=${{ matrix.TARGET.HOST }}
+          CC="${{ matrix.TARGET.HOST_GCC }}" CFLAGS="-Wno-implicit-int" ./configure --target=mips-linux --prefix=/opt/cross --with-gnu-as --disable-gprof --disable-gdb --disable-werror --host=${{ matrix.TARGET.HOST }} --build=${{ matrix.TARGET.HOST }}
 
       - name: Make
         shell: bash
         run: | # The generated `c-parse.c` is already commited on the repo, so we touch it to avoid regenerating it (trying to build old lex/yacc files with modern tools fails)
           touch gcc/c-parse.c
           touch gcc/cp/parse.c
+          touch gcc/cexp.c
           make -C gcc CFLAGS="${{ matrix.TARGET.CFLAGS }}" xgcc cc1 cc1plus cpp cccp g++
 
       - name: Test for file

config.sub

@@ -909,7 +909,7 @@ case $os in
 	      | -ptx* | -coff* | -ecoff* | -winnt* | -domain* | -vsta* \
 	      | -udi* | -eabi* | -lites* | -ieee* | -go32* | -aux* \
 	      | -cygwin32* | -pe* | -psos* | -moss* | -proelf* | -rtems* \
-	      | -mingw32* | -linux-gnu* | -uxpv*)
+	      | -mingw32* | -linux-gnu* | -uxpv* | -darwin* )
 	# Remember, each alternative MUST END IN *, to match a version number.
 		;;
 	# CYGNUS LOCAL

gcc/config.sub

@@ -732,7 +732,7 @@ case $os in
 	      | -ptx* | -coff* | -ecoff* | -winnt* | -domain* | -vsta* \
 	      | -udi* | -eabi* | -lites* | -ieee* | -go32* | -aux* \
 	      | -cygwin32* | -pe* | -psos* | -moss* | -proelf* | -rtems* \
-	      | -mingw32* | -linux-gnu* | -uxpv* | -beos* )
+	      | -mingw32* | -linux-gnu* | -uxpv* | -beos* | -darwin* )
 	# Remember, each alternative MUST END IN *, to match a version number.
 		;;
 	-linux*)

gcc/config/i386/xm-darwin.h

@@ -0,0 +1,4 @@
+/* Configuration for GCC for Intel i386 or later running macOS as host.  */
+
+#include <alloca.h>
+#include "i386/xm-i386.h"

gcc/configure

@@ -2851,6 +2851,9 @@ for machine in $build $host $target; do
 # Next line turned off because both 386BSD and BSD/386 use GNU ld.
 #		use_collect2=yes
 		;;
+	i[34567]86-apple-darwin)	#macOS
+		xm_file=i386/xm-darwin.h
+		;;
 	i[34567]86-*-freebsdelf*)
 		tm_file="i386/i386.h i386/att.h linux.h i386/freebsd-elf.h i386/perform.h"
 		# On FreeBSD, the headers are already ok, except for math.h.

libiberty/strerror.c

@@ -460,6 +460,13 @@ static int num_error_names = 0;
 static int sys_nerr;
 static const char **sys_errlist;
 
+#elif defined(DARWIN)
+
+// macOS added 'const' to these declarations, and clang complains if they are otherwise
+extern const int sys_nerr;
+extern const char *sys_errlist[];
+
+
 #else
 
 extern int sys_nerr;
@@ -468,6 +475,7 @@ extern char *sys_errlist[];
 #endif
 
 
+
 /*
 
 NAME