diff --git a/makefiles/libc/newlib.mk b/makefiles/libc/newlib.mk index d02b1a8fa..e5a1bc68b 100644 --- a/makefiles/libc/newlib.mk +++ b/makefiles/libc/newlib.mk @@ -21,6 +21,13 @@ export LINKFLAGS += -lc # Search for Newlib include directories +# Try to search for newlib in the standard search path of the compiler for includes +ifeq (,$(NEWLIB_INCLUDE_DIR)) + COMPILER_INCLUDE_PATHS := $(shell $(PREFIX)gcc -v -x c -E /dev/null 2>&1 | grep '^\s' | tr -d '\n') + NEWLIB_INCLUDE_DIR := $(firstword $(dir $(wildcard $(addsuffix /newlib.h, $(COMPILER_INCLUDE_PATHS))))) +endif + +ifeq (,$(NEWLIB_INCLUDE_DIR)) # Since Clang is not installed as a separate instance for each crossdev target # we need to tell it where to look for platform specific includes (Newlib # headers instead of Linux/Glibc headers.) @@ -35,17 +42,18 @@ export LINKFLAGS += -lc # Gentoo crossdev, but we prefer to look at /etc/alternatives first. # On OSX, newlib includes are possibly located in # /usr/local/opt/arm-none-eabi*/arm-none-eabi/include or /usr/local/opt/gcc-arm/arm-none-eabi/include -NEWLIB_INCLUDE_PATTERNS ?= \ - /etc/alternatives/gcc-$(TARGET_ARCH)-include \ - /usr/$(TARGET_ARCH)/include \ - /usr/local/opt/$(TARGET_ARCH)*/$(TARGET_ARCH)/include \ - /usr/local/opt/gcc-*/$(TARGET_ARCH)/include \ - # + NEWLIB_INCLUDE_PATTERNS ?= \ + /etc/alternatives/gcc-$(TARGET_ARCH)-include \ + /usr/$(TARGET_ARCH)/include \ + /usr/local/opt/$(TARGET_ARCH)*/$(TARGET_ARCH)/include \ + /usr/local/opt/gcc-*/$(TARGET_ARCH)/include \ + # # Use the wildcard Makefile function to search for existing directories matching # the patterns above. We use the -isystem gcc/clang argument to add the include # directories as system include directories, which means they will not be # searched until after all the project specific include directories (-I/path) -NEWLIB_INCLUDE_DIR ?= $(firstword $(wildcard $(NEWLIB_INCLUDE_PATTERNS))) + NEWLIB_INCLUDE_DIR ?= $(firstword $(dir $(wildcard $(addsuffix /newlib.h, $(NEWLIB_INCLUDE_PATTERNS))))) +endif # If nothing was found we will try to fall back to searching for a cross-gcc in # the current PATH and use a relative path for the includes @@ -64,7 +72,9 @@ ifeq ($(TOOLCHAIN),llvm) endif ifeq (1,$(USE_NEWLIB_NANO)) - NEWLIB_NANO_INCLUDE_DIR ?= $(NEWLIB_INCLUDE_DIR)/newlib-nano + NEWLIB_NANO_INCLUDE_DIR ?= $(firstword $(wildcard $(NEWLIB_INCLUDE_DIR)newlib-nano \ + $(NEWLIB_INCLUDE_DIR)newlib/nano \ + $(NEWLIB_INCLUDE_DIR)nano)) # newlib-nano overrides newlib.h and its include dir should therefore go before # the regular system include dirs. INCLUDES := -isystem $(NEWLIB_NANO_INCLUDE_DIR) $(INCLUDES)