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   1 ifeq ($(filter no-error,$(DEVOPTS)),)
   2 CFLAGS += -Werror
   3 endif
   4 ifneq ($(filter pedantic,$(DEVOPTS)),)
   5 CFLAGS += -pedantic
   6 # don't warn for each N_ use
   7 CFLAGS += -DUSE_PARENS_AROUND_GETTEXT_N=0
   8 endif
   9 CFLAGS += -Wdeclaration-after-statement
  10 CFLAGS += -Wformat-security
  11 CFLAGS += -Wno-format-zero-length
  12 CFLAGS += -Wold-style-definition
  13 CFLAGS += -Woverflow
  14 CFLAGS += -Wpointer-arith
  15 CFLAGS += -Wstrict-prototypes
  16 CFLAGS += -Wunused
  17 CFLAGS += -Wvla
  18
  19 ifndef COMPILER_FEATURES
  20 COMPILER_FEATURES := $(shell ./detect-compiler $(CC))
  21 endif
  22
  23 ifneq ($(filter clang4,$(COMPILER_FEATURES)),)
  24 CFLAGS += -Wtautological-constant-out-of-range-compare
  25 endif
  26
  27 ifneq ($(or $(filter gcc6,$(COMPILER_FEATURES)),$(filter clang4,$(COMPILER_FEATURES))),)
  28 CFLAGS += -Wextra
  29 # if a function is public, there should be a prototype and the right
  30 # header file should be included. If not, it should be static.
  31 CFLAGS += -Wmissing-prototypes
  32 ifeq ($(filter extra-all,$(DEVOPTS)),)
  33 # These are disabled because we have these all over the place.
  34 CFLAGS += -Wno-empty-body
  35 CFLAGS += -Wno-missing-field-initializers
  36 CFLAGS += -Wno-sign-compare
  37 CFLAGS += -Wno-unused-parameter
  38 endif
  39 endif
  40
  41 # uninitialized warnings on gcc 4.9.2 in xdiff/xdiffi.c and config.c
  42 # not worth fixing since newer compilers correctly stop complaining
  43 ifneq ($(filter gcc4,$(COMPILER_FEATURES)),)
  44 ifeq ($(filter gcc5,$(COMPILER_FEATURES)),)
  45 CFLAGS += -Wno-uninitialized
  46 endif
  47 endif