X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=Makefile.flags;h=60bb888d8db53d8dfdaaeee01abb4f3f500bd49c;hb=da75f4484469ca0122b80de69bf3b75a6be71efc;hp=e9405476ba681dc71ddea4d073f83e698b4e1be9;hpb=401de648a797c5931df1ade02c26270c82c3a345;p=oweals%2Fbusybox.git

diff --git a/Makefile.flags b/Makefile.flags
index e9405476b..60bb888d8 100644
--- a/Makefile.flags
+++ b/Makefile.flags
@@ -23,6 +23,7 @@ CFLAGS += $(call cc-option,-Wwrite-strings,)
 CFLAGS += $(call cc-option,-Wundef,)
 CFLAGS += $(call cc-option,-Wstrict-prototypes,)
 CFLAGS += $(call cc-option,-Wunused -Wunused-parameter,)
+CFLAGS += $(call cc-option,-Wunused-function -Wunused-value,)
 CFLAGS += $(call cc-option,-Wmissing-prototypes -Wmissing-declarations,)
 # warn about C99 declaration after statement
 CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
@@ -31,11 +32,21 @@ CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
 
 ifeq ($(CONFIG_WERROR),y)
 CFLAGS += $(call cc-option,-Werror,)
+## TODO:
+## gcc version 4.4.0 20090506 (Red Hat 4.4.0-4) (GCC) is a PITA:
+## const char *ptr; ... off_t v = *(off_t*)ptr; -> BOOM
+## and no easy way to convince it to shut the hell up.
+## We have a lot of such things all over the place.
+## Classic *(off_t*)(void*)ptr does not work,
+## and I am unwilling to do crazy gcc specific ({ void *ppp = ...; })
+## stuff in macros. This would obfuscate the code too much.
+## Maybe try __attribute__((__may_alias__))?
+#CFLAGS += $(call cc-ifversion, -eq, 0404, -fno-strict-aliasing)
 endif
 # gcc 3.x emits bogus "old style proto" warning on find.c:alloc_action()
 CFLAGS += $(call cc-ifversion, -ge, 0400, -Wold-style-definition)
 
-CFLAGS += $(call cc-option,-Os -fno-builtin-strlen -finline-limit=0 -fomit-frame-pointer -ffunction-sections -fdata-sections,)
+CFLAGS += $(call cc-option,-fno-builtin-strlen -finline-limit=0 -fomit-frame-pointer -ffunction-sections -fdata-sections,)
 # -fno-guess-branch-probability: prohibit pseudo-random guessing
 # of branch probabilities (hopefully makes bloatcheck more stable):
 CFLAGS += $(call cc-option,-fno-guess-branch-probability,)
@@ -44,10 +55,18 @@ CFLAGS += $(call cc-option,-falign-functions=1 -falign-jumps=1 -falign-labels=1
 
 # FIXME: These warnings are at least partially to be concerned about and should
 # be fixed..
-#CFLAGS+=$(call cc-option,-Wconversion,)
-
-ifeq ($(CONFIG_DEBUG),y)
-CFLAGS += $(call cc-option,-g)
+#CFLAGS += $(call cc-option,-Wconversion,)
+
+ifneq ($(CONFIG_DEBUG),y)
+CFLAGS += $(call cc-option,-Os,)
+else
+CFLAGS += $(call cc-option,-g,)
+#CFLAGS += "-D_FORTIFY_SOURCE=2"
+ifeq ($(CONFIG_DEBUG_PESSIMIZE),y)
+CFLAGS += $(call cc-option,-O0,)
+else
+CFLAGS += $(call cc-option,-Os,)
+endif
 endif
 
 # If arch/$(ARCH)/Makefile did not override it (with, say, -fPIC)...
@@ -73,6 +92,11 @@ CFLAGS_busybox += $(ARCH_PIE)
 CFLAGS += $(ARCH_FPIE)
 endif
 
+ifneq ($(CONFIG_EXTRA_CFLAGS),)
+CFLAGS += $(strip $(subst ",,$(CONFIG_EXTRA_CFLAGS)))
+#"))
+endif
+
 LDLIBS += m crypt
 
 ifeq ($(CONFIG_PAM),y)
@@ -91,12 +115,12 @@ ifeq ($(CONFIG_DMALLOC),y)
 LDLIBS += dmalloc
 endif
 
-# If a flat binary should be built, CFLAGS_busybox="-Wl,-elf2flt"
+# If a flat binary should be built, CFLAGS_busybox="-elf2flt"
 # env var should be set for make invocation.
 # Here we check whether CFLAGS_busybox indeed contains that flag.
 # (For historical reasons, we also check LDFLAGS, which doesn't
-# seem to be entirely correct variable to put "-Wl,-elf2flt" into).
-W_ELF2FLT = -Wl,-elf2flt
+# seem to be entirely correct variable to put "-elf2flt" into).
+W_ELF2FLT = -elf2flt
 ifneq (,$(findstring $(W_ELF2FLT),$(LDFLAGS) $(CFLAGS_busybox)))
 SKIP_STRIP = y
 endif