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Makefile: Allow define overrides by prepending, not appending, CFLAGS
If we append CFLAGS to the ones passed via command line (if any), -D options we append will override -D options passed on command line (if any). For example, OpenSUSE build flags include -D_FORTIFY_SOURCE=3, and we want to have -D_FORTIFY_SOURCE=2, if and only if not overridden. The current behaviour implies we redefine _FORTIFY_SOURCE as 2, though. Instead of appending CFLAGS, prepend them by adding all the default build flags to another variable, a simply expanded one (defined with :=), named FLAGS, and pass that *before* CFLAGS in targets, so that defines from command line can override default flags. Reported-by: Dario Faggioli <dfaggioli@suse.com> Signed-off-by: Stefano Brivio <sbrivio@redhat.com> Tested-by: Dario Faggioli <dfaggioli@suse.com>
This commit is contained in:
Stefano Brivio
parent
b323e5f439
commit
512f5b1aab
49
Makefile
49
Makefile
@ -23,13 +23,13 @@ AUDIT_ARCH := $(shell echo $(AUDIT_ARCH) | sed 's/I[456]86/I386/')
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AUDIT_ARCH := $(shell echo $(AUDIT_ARCH) | sed 's/PPC64/PPC/')
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AUDIT_ARCH := $(shell echo $(AUDIT_ARCH) | sed 's/PPCLE/PPC64LE/')
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CFLAGS += -Wall -Wextra -pedantic -std=c99 -D_XOPEN_SOURCE=700 -D_GNU_SOURCE
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CFLAGS += -D_FORTIFY_SOURCE=2 -O2 -pie -fPIE
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CFLAGS += -DPAGE_SIZE=$(shell getconf PAGE_SIZE)
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CFLAGS += -DNETNS_RUN_DIR=\"/run/netns\"
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CFLAGS += -DPASST_AUDIT_ARCH=AUDIT_ARCH_$(AUDIT_ARCH)
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CFLAGS += -DRLIMIT_STACK_VAL=$(RLIMIT_STACK_VAL)
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CFLAGS += -DARCH=\"$(TARGET_ARCH)\"
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FLAGS := -Wall -Wextra -pedantic -std=c99 -D_XOPEN_SOURCE=700 -D_GNU_SOURCE
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FLAGS += -D_FORTIFY_SOURCE=2 -O2 -pie -fPIE
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FLAGS += -DPAGE_SIZE=$(shell getconf PAGE_SIZE)
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FLAGS += -DNETNS_RUN_DIR=\"/run/netns\"
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FLAGS += -DPASST_AUDIT_ARCH=AUDIT_ARCH_$(AUDIT_ARCH)
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FLAGS += -DRLIMIT_STACK_VAL=$(RLIMIT_STACK_VAL)
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FLAGS += -DARCH=\"$(TARGET_ARCH)\"
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PASST_SRCS = arch.c arp.c checksum.c conf.c dhcp.c dhcpv6.c icmp.c igmp.c \
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isolation.c lineread.c mld.c ndp.c netlink.c packet.c passt.c pasta.c \
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@ -50,36 +50,36 @@ HEADERS = $(PASST_HEADERS)
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# from the pointer arithmetic used from the tcp_tap_handler() path to get the
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# remote connection address.
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ifeq ($(shell $(CC) -dumpversion),11)
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ifneq (,$(filter -flto%,$(CFLAGS)))
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ifneq (,$(filter -O2,$(CFLAGS)))
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CFLAGS += -DTCP_HASH_NOINLINE
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CFLAGS += -DSIPHASH_20B_NOINLINE
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ifneq (,$(filter -flto%,$(FLAGS) $(CFLAGS)))
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ifneq (,$(filter -O2,$(FLAGS) $(CFLAGS)))
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FLAGS += -DTCP_HASH_NOINLINE
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FLAGS += -DSIPHASH_20B_NOINLINE
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endif
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endif
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endif
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C := \#include <linux/tcp.h>\nstruct tcp_info x = { .tcpi_snd_wnd = 0 };
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ifeq ($(shell printf "$(C)" | $(CC) -S -xc - -o - >/dev/null 2>&1; echo $$?),0)
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CFLAGS += -DHAS_SND_WND
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FLAGS += -DHAS_SND_WND
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endif
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C := \#include <linux/tcp.h>\nstruct tcp_info x = { .tcpi_bytes_acked = 0 };
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ifeq ($(shell printf "$(C)" | $(CC) -S -xc - -o - >/dev/null 2>&1; echo $$?),0)
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CFLAGS += -DHAS_BYTES_ACKED
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FLAGS += -DHAS_BYTES_ACKED
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endif
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C := \#include <linux/tcp.h>\nstruct tcp_info x = { .tcpi_min_rtt = 0 };
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ifeq ($(shell printf "$(C)" | $(CC) -S -xc - -o - >/dev/null 2>&1; echo $$?),0)
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CFLAGS += -DHAS_MIN_RTT
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FLAGS += -DHAS_MIN_RTT
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endif
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C := \#include <sys/random.h>\nint main(){int a=getrandom(0, 0, 0);}
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ifeq ($(shell printf "$(C)" | $(CC) -S -xc - -o - >/dev/null 2>&1; echo $$?),0)
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CFLAGS += -DHAS_GETRANDOM
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FLAGS += -DHAS_GETRANDOM
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endif
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ifeq ($(shell :|$(CC) -fstack-protector-strong -S -xc - -o - >/dev/null 2>&1; echo $$?),0)
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CFLAGS += -fstack-protector-strong
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FLAGS += -fstack-protector-strong
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endif
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prefix ?= /usr/local
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@ -98,18 +98,19 @@ endif
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all: $(BIN) $(MANPAGES) docs
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static: CFLAGS += -static -DGLIBC_NO_STATIC_NSS
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static: FLAGS += -static -DGLIBC_NO_STATIC_NSS
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static: clean all
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seccomp.h: $(PASST_SRCS) $(PASST_HEADERS)
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@ EXTRA_SYSCALLS=$(EXTRA_SYSCALLS) ./seccomp.sh $^
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passt: $(PASST_SRCS) $(PASST_HEADERS) seccomp.h
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$(CC) $(CFLAGS) $(PASST_SRCS) -o passt $(LDFLAGS)
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$(CC) $(FLAGS) $(CFLAGS) $(PASST_SRCS) -o passt $(LDFLAGS)
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passt.avx2: CFLAGS += -Ofast -mavx2 -ftree-vectorize -funroll-loops
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passt.avx2: FLAGS += -Ofast -mavx2 -ftree-vectorize -funroll-loops
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passt.avx2: $(PASST_SRCS) $(PASST_HEADERS) seccomp.h
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$(CC) $(filter-out -O2,$(CFLAGS)) $(PASST_SRCS) -o passt.avx2 $(LDFLAGS)
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$(CC) $(filter-out -O2,$(FLAGS) $(CFLAGS)) \
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$(PASST_SRCS) -o passt.avx2 $(LDFLAGS)
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passt.avx2: passt
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@ -117,12 +118,12 @@ pasta.avx2 pasta.1 pasta: pasta%: passt%
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ln -s $< $@
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qrap: $(QRAP_SRCS) passt.h
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$(CC) $(CFLAGS) $(QRAP_SRCS) -o qrap $(LDFLAGS)
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$(CC) $(FLAGS) $(CFLAGS) $(QRAP_SRCS) -o qrap $(LDFLAGS)
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valgrind: EXTRA_SYSCALLS="rt_sigprocmask rt_sigtimedwait rt_sigaction \
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getpid gettid kill clock_gettime mmap munmap open \
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unlink gettimeofday futex"
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valgrind: CFLAGS:=-g -O0 $(filter-out -O%,$(CFLAGS))
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valgrind: FLAGS:=-g -O0 $(filter-out -O%,$(FLAGS))
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valgrind: all
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.PHONY: clean
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@ -261,7 +262,7 @@ clang-tidy: $(SRCS) $(HEADERS)
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-altera-struct-pack-align,\
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-concurrency-mt-unsafe \
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-config='{CheckOptions: [{key: bugprone-suspicious-string-compare.WarnOnImplicitComparison, value: "false"}]}' \
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--warnings-as-errors=* $(SRCS) -- $(filter-out -pie,$(CFLAGS))
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--warnings-as-errors=* $(SRCS) -- $(filter-out -pie,$(FLAGS) $(CFLAGS))
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ifeq ($(shell $(CC) -v 2>&1 | grep -c "gcc version"),1)
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TARGET := $(shell ${CC} -v 2>&1 | sed -n 's/Target: \(.*\)/\1/p')
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@ -304,5 +305,5 @@ cppcheck: $(SRCS) $(HEADERS)
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--suppress=unmatchedSuppression:udp.c \
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--suppress=unmatchedSuppression:util.c \
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--suppress=unmatchedSuppression:util.h \
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$(filter -D%,$(CFLAGS)) \
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$(filter -D%,$(FLAGS) $(CFLAGS)) \
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.
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