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Improved flow of setting variables in makefile

pull/35/head
Jeffrey Walton 2015-07-23 03:17:18 -04:00
parent b3924a7b86
commit cd33142f6c
1 changed files with 7 additions and 7 deletions
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14
GNUmakefile
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@ -20,6 +20,12 @@ CLANG_COMPILER = $(shell $(CXX) --version 2>&1 | $(EGREP) -i -c "clang")
INTEL_COMPILER = $(shell $(CXX) --version 2>&1 | $(EGREP) -i -c "\(ICC\)")
SUN_COMPILER = $(shell $(CXX) -V 2>&1 | $(EGREP) -i -c "CC: Sun")
# Also see LLVM Bug 24200 (https://llvm.org/bugs/show_bug.cgi?id=24200)
# CLANG_ASSEMBLER ?= $(shell $(CXX) -xc -c /dev/null -Wa,-v -o/dev/null 2>&1 | $(EGREP) -i -c "^clang")
# TODO: Uncomment the line above when Clang's integrated assembler can parse inline assembly
CLANG_ASSEMBLER ?= 0
GNU_ASSEMBLER ?= $(shell $(CXX) -xc -c /dev/null -Wa,-v -o/dev/null 2>&1 | $(EGREP) -i -c "^GNU assembler")
# Default prefix for make install
ifeq ($(PREFIX),)
PREFIX = /usr
@ -32,22 +38,16 @@ ifneq ($(CLANG_COMPILER),0)
CXXFLAGS += -Wall
endif
# Also see LLVM Bug 24200 (https://llvm.org/bugs/show_bug.cgi?id=24200)
# CLANG_ASSEMBLER ?= $(shell $(CXX) -xc -c /dev/null -Wa,-v -o/dev/null 2>&1 | $(EGREP) -i -c "^clang")
# TODO: Uncomment the line above when Clang's integrated assembler can parse inline assembly
CLANG_ASSEMBLER ?= 0
ifeq ($(IS_X86),1)
GCC42_OR_LATER = $(shell $(CXX) -v 2>&1 | $(EGREP) -i -c "^gcc version (4.[2-9]|[5-9])")
ICC111_OR_LATER = $(shell $(CXX) --version 2>&1 | $(EGREP) -c "\(ICC\) ([2-9][0-9]|1[2-9]|11\.[1-9])")
ifeq ($(CLANG_ASSEMBLER),0)
ifneq ($(GNU_ASSEMBLER),0)
# Using system provided assembler. It may be GNU AS (GAS).
GAS210_OR_LATER ?= $(shell $(CXX) -xc -c /dev/null -Wa,-v -o/dev/null 2>&1 | $(EGREP) -c "GNU assembler version (2\.[1-9][0-9]|[3-9])")
GAS217_OR_LATER ?= $(shell $(CXX) -xc -c /dev/null -Wa,-v -o/dev/null 2>&1 | $(EGREP) -c "GNU assembler version (2\.1[7-9]|2\.[2-9]|[3-9])")
GAS219_OR_LATER ?= $(shell $(CXX) -xc -c /dev/null -Wa,-v -o/dev/null 2>&1 | $(EGREP) -c "GNU assembler version (2\.19|2\.[2-9]|[3-9])")
else
endif
# Enable PIC for x86_64 targets