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Mark global additions to CFLAGS and LDFLAGS as override.

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This prevents them from being overriden by command line variables, e.g.
something like `make CFLAGS=-0`. Requested by @smcv in #523.
This commit is contained in:
Yamagi 2020-03-13 09:19:32 +01:00
parent b48cc47465
commit 11cb64ede2
1 changed files with 19 additions and 19 deletions
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38
Makefile
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@ -132,17 +132,17 @@ endif
# to get it there...
# -fwrapv for defined integer wrapping. MSVC6 did this
# and the game code requires it.
CFLAGS += -std=gnu99 -fno-strict-aliasing -fwrapv
override CFLAGS += -std=gnu99 -fno-strict-aliasing -fwrapv
# -MMD to generate header dependencies. Unsupported by
# the Clang shipped with OS X.
ifneq ($(YQ2_OSTYPE), Darwin)
CFLAGS += -MMD
override CFLAGS += -MMD
endif
# OS X architecture.
ifeq ($(YQ2_OSTYPE), Darwin)
CFLAGS += $(OSX_ARCH)
override CFLAGS += $(OSX_ARCH)
endif
# ----------
@ -151,27 +151,27 @@ endif
ifeq ($(COMPILER), clang)
# -Wno-missing-braces because otherwise clang complains
# about totally valid 'vec3_t bla = {0}' constructs.
CFLAGS += -Wno-missing-braces
override CFLAGS += -Wno-missing-braces
else ifeq ($(COMPILER), gcc)
# GCC 8.0 or higher.
ifeq ($(shell test $(COMPILERVER) -ge 80000; echo $$?),0)
# -Wno-format-truncation and -Wno-format-overflow
# because GCC spams about 50 false positives.
CFLAGS += -Wno-format-truncation -Wno-format-overflow
override CFLAGS += -Wno-format-truncation -Wno-format-overflow
endif
endif
# ----------
# Defines the operating system and architecture
CFLAGS += -DYQ2OSTYPE=\"$(YQ2_OSTYPE)\" -DYQ2ARCH=\"$(YQ2_ARCH)\"
override CFLAGS += -DYQ2OSTYPE=\"$(YQ2_OSTYPE)\" -DYQ2ARCH=\"$(YQ2_ARCH)\"
# ----------
# Fore reproduceable builds, look here for details:
# https://reproducible-builds.org/specs/source-date-epoch/
ifdef SOURCE_DATE_EPOCH
CFLAGS += -DBUILD_DATE=\"$(shell date --utc --date="@${SOURCE_DATE_EPOCH}" +"%b %_d %Y" | sed -e 's/ /\\ /g')\"
override CFLAGS += -DBUILD_DATE=\"$(shell date --utc --date="@${SOURCE_DATE_EPOCH}" +"%b %_d %Y" | sed -e 's/ /\\ /g')\"
endif
# ----------
@ -181,14 +181,14 @@ endif
# Would be nice if Clang had something comparable.
ifeq ($(YQ2_ARCH), i386)
ifeq ($(COMPILER), gcc)
CFLAGS += -ffloat-store
override CFLAGS += -ffloat-store
endif
endif
# Force SSE math on x86_64. All sane compilers should do this
# anyway, just to protect us from broken Linux distros.
ifeq ($(YQ2_ARCH), x86_64)
CFLAGS += -mfpmath=sse
override CFLAGS += -mfpmath=sse
endif
# In ARM mode it cannot generate yield instruction
@ -205,9 +205,9 @@ endif
# Systemwide installation.
ifeq ($(WITH_SYSTEMWIDE),yes)
CFLAGS += -DSYSTEMWIDE
override CFLAGS += -DSYSTEMWIDE
ifneq ($(WITH_SYSTEMDIR),"")
CFLAGS += -DSYSTEMDIR=\"$(WITH_SYSTEMDIR)\"
override CFLAGS += -DSYSTEMDIR=\"$(WITH_SYSTEMDIR)\"
endif
endif
@ -271,26 +271,26 @@ endif
# Required libraries.
ifeq ($(YQ2_OSTYPE),Linux)
LDFLAGS += -lm -ldl -rdynamic
override LDFLAGS += -lm -ldl -rdynamic
else ifeq ($(YQ2_OSTYPE),FreeBSD)
LDFLAGS += -lm
override LDFLAGS += -lm
else ifeq ($(YQ2_OSTYPE),OpenBSD)
LDFLAGS += -lm
override LDFLAGS += -lm
else ifeq ($(YQ2_OSTYPE),Windows)
LDFLAGS += -lws2_32 -lwinmm -static-libgcc
override LDFLAGS += -lws2_32 -lwinmm -static-libgcc
else ifeq ($(YQ2_OSTYPE), Darwin)
LDFLAGS += $(OSX_ARCH)
override LDFLAGS += $(OSX_ARCH)
endif
# Keep symbols hidden.
CFLAGS += -fvisibility=hidden
LDFLAGS += -fvisibility=hidden
override CFLAGS += -fvisibility=hidden
override LDFLAGS += -fvisibility=hidden
ifneq ($(YQ2_OSTYPE), Darwin)
ifneq ($(YQ2_OSTYPE), OpenBSD)
# For some reason the OSX & OpenBSD
# linker doesn't support this...
LDFLAGS += -Wl,--no-undefined
override LDFLAGS += -Wl,--no-undefined
endif
endif