build: make -no_warn_duplicate_libraries conditional on Xcode >= 15 (#…

…6074)

Makefile

@@ -49,10 +49,14 @@ else
 export GOTESTCOMMAND=gotestsum --format pkgname --jsonfile testresults.json --
 endif
 
-# M1 Mac--homebrew install location in /opt/homebrew
 ifeq ($(OS_TYPE), darwin)
-ifeq ($(ARCH), arm64)
+# For Xcode >= 15, set -no_warn_duplicate_libraries linker option
+CLANG_MAJOR_VERSION := $(shell clang --version | grep '^Apple clang version ' | awk '{print $$4}' | cut -d. -f1)
+ifeq ($(shell [ $(CLANG_MAJOR_VERSION) -ge 15 ] && echo true), true)
 EXTLDFLAGS := -Wl,-no_warn_duplicate_libraries
+endif
+# M1 Mac--homebrew install location in /opt/homebrew
+ifeq ($(ARCH), arm64)
 export CPATH=/opt/homebrew/include
 export LIBRARY_PATH=/opt/homebrew/lib
 endif