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[BUILD] add -fno-strict-aliasing to fix warnings with gcc >= 4.4

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Gcc 4.4 enables strict aliasing by default, resuling in complaints
when casting struct sockaddr_storage to sockaddr_in. Not only doing
this does not provide any noticeable performance improvement, it also
presents a risk of strange bugs even when the compiler does not emit
a warning, so let's disable this optimization !
This commit is contained in:
Willy Tarreau 2010-11-28 08:28:15 +01:00
parent a5899aaad5
commit 3c9a3fb0b8
3 changed files with 10 additions and 3 deletions
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7
Makefile
View File

@ -97,6 +97,11 @@ LD = $(CC)
# Those flags only feed CFLAGS so it is not mandatory to use this form.
DEBUG_CFLAGS = -g
#### Compiler-specific flags that may be used to disable some negative over-
# optimization or to silence some warnings. -fno-strict-aliasing is needed with
# gcc >= 4.4.
SPEC_CFLAGS = -fno-strict-aliasing
#### Memory usage tuning
# If small memory footprint is required, you can reduce the buffer size. There
# are 2 buffers per concurrent session, so 16 kB buffers will eat 32 MB memory
@ -154,7 +159,7 @@ ARCH_FLAGS = $(ARCH_FLAGS.$(ARCH))
# These CFLAGS contain general optimization options, CPU-specific optimizations
# and debug flags. They may be overridden by some distributions which prefer to
# set all of them at once instead of playing with the CPU and DEBUG variables.
CFLAGS = $(ARCH_FLAGS) $(CPU_CFLAGS) $(DEBUG_CFLAGS)
CFLAGS = $(ARCH_FLAGS) $(CPU_CFLAGS) $(DEBUG_CFLAGS) $(SPEC_CFLAGS)
#### Common LDFLAGS
# These LDFLAGS are used as the first "ld" options, regardless of any library

3
Makefile.bsd
View File

@ -86,6 +86,7 @@ DLMALLOC_THRES=4096
TARGET_OPTS=$(COPTS.$(TARGET))
REGEX_OPTS=$(COPTS.$(REGEX))
CPU_OPTS=$(COPTS.$(CPU))
SPEC_OPTS=-fno-strict-aliasing
VERSION != cat VERSION 2>/dev/null || touch VERSION
SUBVERS != cat SUBVERS 2>/dev/null || touch SUBVERS
@ -98,7 +99,7 @@ VER_OPTS := -DCONFIG_HAPROXY_VERSION=\"$(VERSION)$(SUBVERS)\" \
EBTREE_DIR := ebtree
COPTS = -Iinclude -I$(EBTREE_DIR) $(ADDINC) $(CPU_OPTS) $(TARGET_OPTS) \
$(REGEX_OPTS) $(SMALL_OPTS) $(VER_OPTS) $(DEFINE)
$(SPEC_OPTS) $(REGEX_OPTS) $(SMALL_OPTS) $(VER_OPTS) $(DEFINE)
LIBS = $(LIBS.$(TARGET)) $(LIBS.$(REGEX)) $(ADDLIB)
CFLAGS = -Wall $(COPTS) $(DEBUG)
LDFLAGS = -g

3
Makefile.osx
View File

@ -86,6 +86,7 @@ DLMALLOC_THRES=4096
TARGET_OPTS=$(COPTS.$(TARGET))
REGEX_OPTS=$(COPTS.$(REGEX))
CPU_OPTS=$(COPTS.$(CPU))
SPEC_OPTS=-fno-strict-aliasing
VERSION != cat VERSION 2>/dev/null || touch VERSION
SUBVERS != cat SUBVERS 2>/dev/null || touch SUBVERS
@ -95,7 +96,7 @@ VER_OPTS := -DCONFIG_HAPROXY_VERSION=\"$(VERSION)$(SUBVERS)\" \
-DCONFIG_HAPROXY_DATE=\"$(VERDATE)\"
COPTS = -Iinclude -I$(EBTREE_DIR) $(ADDINC) $(CPU_OPTS) $(TARGET_OPTS) \
$(REGEX_OPTS) $(SMALL_OPTS) $(VER_OPTS) $(DEFINE)
$(SPEC_OPTS) $(REGEX_OPTS) $(SMALL_OPTS) $(VER_OPTS) $(DEFINE)
LIBS = $(LIBS.$(TARGET)) $(LIBS.$(REGEX)) $(ADDLIB)
CFLAGS = -Wall $(COPTS) $(DEBUG) -isysroot /Developer/SDKs/MacOSX10.4u.sdk -arch ppc -arch i386 -mmacosx-version-min=10.4
LDFLAGS = -g -isysroot /Developer/SDKs/MacOSX10.4u.sdk -arch ppc -arch i386 -mmacosx-version-min=10.4