c25356d5978632df6203437e1953bcb29e0c736fTimo Sirainendnl * gcc specific options

c25356d5978632df6203437e1953bcb29e0c736fTimo SirainenAC_DEFUN([DOVECOT_CFLAGS],[

c7480644202e5451fbed448508ea29a25cffc99cTimo Sirainen if test "x$ac_cv_c_compiler_gnu" = "xyes"; then

e34d170f8f0e084bd94bfbc1a7085ece67e508dfTimo Sirainen # -Wcast-qual -Wcast-align -Wconversion -Wunreachable-code # too many warnings

e34d170f8f0e084bd94bfbc1a7085ece67e508dfTimo Sirainen # -Wstrict-prototypes -Wredundant-decls # may give warnings in some systems

c7480644202e5451fbed448508ea29a25cffc99cTimo Sirainen # -Wmissing-format-attribute -Wmissing-noreturn -Wwrite-strings # a couple of warnings

c7480644202e5451fbed448508ea29a25cffc99cTimo Sirainen CFLAGS="$CFLAGS -Wall -W -Wmissing-prototypes -Wmissing-declarations -Wpointer-arith -Wchar-subscripts -Wformat=2 -Wbad-function-cast"

c7480644202e5451fbed448508ea29a25cffc99cTimo Sirainen

c7480644202e5451fbed448508ea29a25cffc99cTimo Sirainen if test "$have_clang" = "yes"; then

c7480644202e5451fbed448508ea29a25cffc99cTimo Sirainen AC_TRY_COMPILE([

88c2db95c4a0f8f7986a63cd57cf4b6850d76543Timo Sirainen #if __clang_major__ > 3 || (__clang_major__ == 3 && __clang_minor__ >= 3)

88c2db95c4a0f8f7986a63cd57cf4b6850d76543Timo Sirainen # error new clang

88c2db95c4a0f8f7986a63cd57cf4b6850d76543Timo Sirainen #endif

88c2db95c4a0f8f7986a63cd57cf4b6850d76543Timo Sirainen ],,,[

88c2db95c4a0f8f7986a63cd57cf4b6850d76543Timo Sirainen # clang 3.3+ unfortunately this gives warnings with hash.h

c7480644202e5451fbed448508ea29a25cffc99cTimo Sirainen CFLAGS="$CFLAGS -Wno-duplicate-decl-specifier"

c7480644202e5451fbed448508ea29a25cffc99cTimo Sirainen ])

c7480644202e5451fbed448508ea29a25cffc99cTimo Sirainen else

c7480644202e5451fbed448508ea29a25cffc99cTimo Sirainen # This is simply to avoid warning when building strftime() wrappers..

a10ed8c47534b4c6b6bf2711ccfe577e720a47b4Timo Sirainen CFLAGS="$CFLAGS -fno-builtin-strftime"

a10ed8c47534b4c6b6bf2711ccfe577e720a47b4Timo Sirainen fi

c7480644202e5451fbed448508ea29a25cffc99cTimo Sirainen

c25356d5978632df6203437e1953bcb29e0c736fTimo Sirainen AC_TRY_COMPILE([

#if __GNUC__ < 4

# error old gcc

#endif

],,[

# gcc4

CFLAGS="$CFLAGS -Wstrict-aliasing=2"

])

# Use std=gnu99 if we have new enough gcc

old_cflags=$CFLAGS

CFLAGS="-std=gnu99"

AC_TRY_COMPILE([

],, [

CFLAGS="$CFLAGS $old_cflags"

], [

CFLAGS="$old_cflags"

])

fi

if test "$have_clang" = "yes"; then

# clang specific options

if test "$want_devel_checks" = "yes"; then

# FIXME: enable once md[45], sha[12] can be compiled without

#CFLAGS="$CFLAGS -fsanitize=integer,undefined -ftrapv"

:

fi

fi

])