Mac support

.github/workflows/build.yml

@@ -1,6 +1,6 @@
 name: Build
 
-on: [push]
+on: [push, pull_request]
 
 jobs:
   build:
@@ -13,18 +13,20 @@ jobs:
               OS: 'ubuntu-20.04',
               CFLAGS: '-static -fno-stack-protector -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=0',
               HOST: 'i386-pc-linux',
-              ARCHIVE_NAME: 'mips-binutils-egcs-2.9.5-linux.tar.gz'
+              ARCHIVE_NAME: 'mips-binutils-egcs-2.9.5-linux.tar.gz',
+              HOST_GCC: 'gcc'
+            }
+          - {
+              OS: 'macos-13',
+              CFLAGS: '-DDARWIN -Wno-implicit-int -Wno-return-type -Wno-error -Wno-implicit-function-declaration -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=0',
+              HOST: 'i386-apple-darwin',
+              ARCHIVE_NAME: 'mips-binutils-egcs-2.9.5-mac.tar.gz',
+              HOST_GCC: 'gcc-13'
             }
-          # - {
-          #     OS: 'macos-latest',
-          #     CFLAGS: '-DDARWIN -Wno-return-type -Wno-error -Wno-implicit-function-declaration -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=0',
-          #     HOST: 'i386-apple-darwin',
-          #     ARCHIVE_NAME: 'mips-binutils-egcs-2.9.5-mac.tar.gz'
-          #   }
 
     name: Building binutils for ${{ matrix.TARGET.OS }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Install dependencies (Ubuntu)
         shell: bash
@@ -35,7 +37,7 @@ jobs:
       - name: Configure for mips
         shell: bash
         run: |
-          ./configure --target=mips-linux --prefix=/opt/cross --disable-gprof --disable-gdb --disable-werror --host=${{ matrix.TARGET.HOST }} --build=${{ matrix.TARGET.HOST }}
+          CC="${{ matrix.TARGET.HOST_GCC }}" CFLAGS="-Wno-implicit-int" ./configure --target=mips-linux --prefix=/opt/cross --disable-gprof --disable-gdb --disable-werror --host=${{ matrix.TARGET.HOST }} --build=${{ matrix.TARGET.HOST }}
 
       - name: Make
         shell: bash

config.sub

@@ -905,7 +905,7 @@ case $os in
 	      | -udi* | -eabi* | -lites* | -ieee* | -go32* | -aux* \
 	      | -cygwin* | -pe* | -psos* | -moss* | -proelf* | -rtems* \
 	      | -mingw32* | -linux-gnu* | -uxpv* | -beos* | -mpeix* | -udk* \
-	      | -interix* | -uwin* | -rhapsody* | -openstep* | -oskit*)
+	      | -interix* | -uwin* | -rhapsody* | -openstep* | -oskit*| -darwin*)
 	# Remember, each alternative MUST END IN *, to match a version number.
 		;;
 	-sim | -es1800* | -hms* | -xray | -os68k* | -none* | -v88r* \

ld/ldlex.l

@@ -76,9 +76,15 @@ static unsigned int lineno_stack[MAX_INCLUDE_DEPTH];
 static unsigned int include_stack_ptr = 0;
 static int vers_node_nesting = 0;
 
+#ifdef DARWIN
+#define YY_SIZE_T yy_size_t
+#else
+#define YY_SIZE_T int
+#endif
+
 static YY_BUFFER_STATE yy_create_string_buffer PARAMS ((const char *string,
 							size_t size));
-static void yy_input PARAMS ((char *, int *result, int max_size));
+static void yy_input PARAMS ((char *, YY_SIZE_T *result, int max_size));
 
 static void comment PARAMS ((void));
 static void lex_warn_invalid PARAMS ((char *where, char *what));
@@ -581,7 +587,7 @@ ldlex_popstate ()
 static void
 yy_input (buf, result, max_size)
      char *buf;
-     int *result;
+     YY_SIZE_T *result;
      int max_size;
 {
   *result = 0; 

libiberty/strerror.c

@@ -460,6 +460,12 @@ 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;