diff --git a/makefiles/libc/newlib.mk b/makefiles/libc/newlib.mk index f1b0740ae59cadda98fd8233b23a9db6b3052585..916105657effe5849fb8c4a6fbfc7410d07bb3e6 100644 --- a/makefiles/libc/newlib.mk +++ b/makefiles/libc/newlib.mk @@ -39,30 +39,30 @@ ifeq (,$(NEWLIB_INCLUDE_DIR)) endif ifeq (,$(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.) -# On GCC this is done when building the cross compiler toolchain so we do not -# actually need to specify the include paths for system includes. -# Ubuntu gcc-arm-embedded toolchain (https://launchpad.net/gcc-arm-embedded) -# places newlib headers in several places, but the primary source seem to be -# /etc/alternatives/gcc-arm-none-eabi-include -# Gentoo Linux crossdev place the newlib headers in /usr/arm-none-eabi/include -# Arch Linux also place the newlib headers in /usr/arm-none-eabi/include -# Ubuntu seem to put a copy of the newlib headers in the same place as -# 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 + # 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.) + # On GCC this is done when building the cross compiler toolchain so we do not + # actually need to specify the include paths for system includes. + # Ubuntu gcc-arm-embedded toolchain (https://launchpad.net/gcc-arm-embedded) + # places newlib headers in several places, but the primary source seem to be + # /etc/alternatives/gcc-arm-none-eabi-include + # Gentoo Linux crossdev place the newlib headers in /usr/arm-none-eabi/include + # Arch Linux also place the newlib headers in /usr/arm-none-eabi/include + # Ubuntu seem to put a copy of the newlib headers in the same place as + # 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 \ # -# 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) + # 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 $(realpath $(dir $(wildcard $(addsuffix /newlib.h, $(NEWLIB_INCLUDE_PATTERNS)))))) endif