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newlib: include fixes for newlib-nano

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This commit is contained in:
Cenk Gündoğan 2018-06-21 14:20:31 +02:00
parent 42c4460daf
commit db6cb1ac65
1 changed files with 18 additions and 8 deletions
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26
makefiles/libc/newlib.mk
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@ -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)