diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index daec929a..6ee25b02 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -11,7 +11,7 @@ env:
   IS_DEPLOY: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
 
 jobs:
-  build:
+  build-linux:
     runs-on: ubuntu-latest
     steps:
 
@@ -47,9 +47,24 @@ jobs:
           name: agbcc.tar.gz
           path: agbcc.tar.gz
 
+  build-macos:
+    runs-on: macos-latest
+    steps:
+
+      - name: Checkout
+        uses: actions/checkout@main
+
+      - name: Install deps
+        run: |
+          brew install arm-none-eabi-binutils
+          brew install arm-none-eabi-gcc
+
+      - name: Compile
+        run: sh build.sh
+
   deploy:
     runs-on: ubuntu-latest
-    needs: build
+    needs: build-linux
     if: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
     permissions:
       contents: write
diff --git a/gcc/Makefile b/gcc/Makefile
index 9756e901..c34b354e 100644
--- a/gcc/Makefile
+++ b/gcc/Makefile
@@ -24,7 +24,7 @@ VPATH = $(srcdir)
 
 CC = gcc
 
-BASE_CFLAGS = -g -std=gnu11 -Werror-implicit-function-declaration
+BASE_CFLAGS = -g -std=gnu11 -Werror-implicit-function-declaration -Wno-error=incompatible-pointer-types
 
 INCLUDES = -I. -I$(srcdir)
 
diff --git a/gcc_arm/Makefile.in b/gcc_arm/Makefile.in
index 09a87117..10641b80 100755
--- a/gcc_arm/Makefile.in
+++ b/gcc_arm/Makefile.in
@@ -64,7 +64,7 @@ ALLOCA_FINISH = true
 XCFLAGS =
 TCFLAGS =
 # CYGNUS LOCAL nowarnings/law
-CFLAGS = -g -Werror-implicit-function-declaration
+CFLAGS = -g -Werror-implicit-function-declaration -Wno-error=incompatible-pointer-types
 BOOT_CFLAGS = -O2 $(CFLAGS)
 WARN_CFLAGS =
 # END CYGNUS LOCAL
diff --git a/gcc_arm/configure b/gcc_arm/configure
index 05c0782f..0b7738dc 100755
--- a/gcc_arm/configure
+++ b/gcc_arm/configure
@@ -1138,7 +1138,7 @@ cat > conftest.$ac_ext << EOF
 #line 1139 "configure"
 #include "confdefs.h"
 
-main(){return(0);}
+int main(){return(0);}
 EOF
 if { (eval echo configure:1144: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   ac_cv_prog_cc_works=yes