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Added some sane defaults for -g and -O if they are missing from CXXFLAGS

pull/35/head
Jeffrey Walton 2015-07-25 05:03:13 -04:00
parent 6bdcaefccd
commit 427b45b4e7
1 changed files with 21 additions and 3 deletions
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24
GNUmakefile
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@ -11,8 +11,6 @@ MKDIR ?= mkdir
EGREP ?= egrep EGREP ?= egrep
UNAME ?= uname UNAME ?= uname
# $(error Flags: $(ARFLAGS))
# Default setting from environment. Disable verbose flag, add create flag # Default setting from environment. Disable verbose flag, add create flag
ifeq ($(findstring rv,$(ARFLAGS)),rv) ifeq ($(findstring rv,$(ARFLAGS)),rv)
ARFLAGS = cr ARFLAGS = cr
@ -20,15 +18,35 @@ endif
######################### #########################
# CXXFLAGS # CXXFLAGS
CXXFLAGS ?= -DNDEBUG -g2 -O3
# -fPIC is supported, and enabled by default for x86_64. # -fPIC is supported, and enabled by default for x86_64.
# We can augment CXXFLAGS if the user exports them in the shell, or if the user
# omits them. However, if the user `make CXXFLAGS="-g1"`, then that's what
# the user gets. Make does not override them, and does not honor our '+='.
CXXFLAGS ?= -DNDEBUG -g2 -O3
# Add -DNDEBUG if nothing specified
ifeq ($(filter -DDEBUG -DNDEBUG,$(CXXFLAGS)),)
CXXFLAGS += -DNDEBUG
endif
# Add a symolize if nothing specified
ifeq ($(filter -g -g1 -g2 -g3 -Oz,$(CXXFLAGS)),)
CXXFLAGS += -g2
endif
# Add an optimize if nothing specified
ifeq ($(filter -O -O0 -O1 -O2 -O3 -Og -Os -Oz -Ofast,$(CXXFLAGS)),)
CXXFLAGS += -O3
endif
# the following options reduce code size, but breaks link or makes link very slow on some systems # the following options reduce code size, but breaks link or makes link very slow on some systems
# CXXFLAGS += -ffunction-sections -fdata-sections # CXXFLAGS += -ffunction-sections -fdata-sections
# LDFLAGS += -Wl,--gc-sections # LDFLAGS += -Wl,--gc-sections
######################### #########################
# Compilers # Compilers
CLANG_COMPILER = $(shell $(CXX) --version 2>&1 | $(EGREP) -i -c "clang") CLANG_COMPILER = $(shell $(CXX) --version 2>&1 | $(EGREP) -i -c "clang")
INTEL_COMPILER = $(shell $(CXX) --version 2>&1 | $(EGREP) -i -c "\(ICC\)") INTEL_COMPILER = $(shell $(CXX) --version 2>&1 | $(EGREP) -i -c "\(ICC\)")
SUN_COMPILER = $(shell $(CXX) -V 2>&1 | $(EGREP) -i -c "CC: Sun") SUN_COMPILER = $(shell $(CXX) -V 2>&1 | $(EGREP) -i -c "CC: Sun")