[CompilerSupportLibraries_jll] Fix soname of libgcc_s on x86_64-darwin

Make.inc

@@ -1472,8 +1472,18 @@ else
 LIBGCC_NAME := libgcc_s_seh-1.$(SHLIB_EXT)
 endif
 endif
+# On macOS, libgcc_s has soversion 1.1 always on aarch64 and only for GCC 12+
+# (-> libgfortran 5) on x86_64
 ifeq ($(OS),Darwin)
+ifeq ($(ARCH),aarch64)
 LIBGCC_NAME := libgcc_s.1.1.$(SHLIB_EXT)
+else
+ifeq ($(LIBGFORTRAN_VERSION),5)
+LIBGCC_NAME := libgcc_s.1.1.$(SHLIB_EXT)
+else
+LIBGCC_NAME := libgcc_s.1.$(SHLIB_EXT)
+endif
+endif
 endif
 ifneq ($(findstring $(OS),Linux FreeBSD),)
 LIBGCC_NAME := libgcc_s.$(SHLIB_EXT).1

base/Makefile

@@ -235,11 +235,19 @@ else ifneq ($(USE_SYSTEM_OPENLIBM),0)
 $(eval $(call symlink_system_library,OPENLIBM,$(LIBMNAME)))
 endif
 
+# On macOS, libgcc_s has soversion 1.1 always on aarch64 and only for GCC 12+
+# (-> libgfortran 5) on x86_64
 ifeq ($(OS),Darwin)
+ifeq ($(ARCH),aarch64)
+$(eval $(call symlink_system_library,CSL,libgcc_s,1.1))
+else
+ifeq ($(LIBGFORTRAN_VERSION),5)
 $(eval $(call symlink_system_library,CSL,libgcc_s,1.1))
 else
 $(eval $(call symlink_system_library,CSL,libgcc_s,1))
 endif
+endif
+endif
 ifneq (,$(LIBGFORTRAN_VERSION))
 $(eval $(call symlink_system_library,CSL,libgfortran,$(LIBGFORTRAN_VERSION)))
 endif

stdlib/CompilerSupportLibraries_jll/src/CompilerSupportLibraries_jll.jl

@@ -32,7 +32,11 @@ if Sys.iswindows()
     const libstdcxx = "libstdc++-6.dll"
     const libgomp = "libgomp-1.dll"
 elseif Sys.isapple()
-    const libgcc_s = "@rpath/libgcc_s.1.1.dylib"
+    if arch(HostPlatform()) == "aarch64" || libgfortran_version(HostPlatform()) == v"5"
+        const libgcc_s = "@rpath/libgcc_s.1.1.dylib"
+    else
+        const libgcc_s = "@rpath/libgcc_s.1.dylib"
+    end
     const libgfortran = string("@rpath/", "libgfortran.", libgfortran_version(HostPlatform()).major, ".dylib")
     const libstdcxx = "@rpath/libstdc++.6.dylib"
     const libgomp = "@rpath/libgomp.1.dylib"