generic-library/libreSSL
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make compiler checks for -Wall and -std=gnu99

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Yes, there are compilers that do not understand or need these.
This commit is contained in:
Brent Cook 2015-04-14 08:43:52 -05:00
parent 3096ab0e45
commit 5cf05de18c
1 changed files with 36 additions and 14 deletions
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50
configure.ac
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@ -9,14 +9,13 @@ AC_CONFIG_MACRO_DIR([m4])
m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
AM_PROG_AS
AC_PROG_CC
AC_PROG_CC_STDC
AM_PROG_CC_C_O
AC_PROG_LIBTOOL
LT_INIT
CFLAGS="$CFLAGS -Wall -std=gnu99"
case $host_os in
*aix*)
HOST_OS=aix
@ -88,6 +87,40 @@ AC_CHECK_FUNC([clock_gettime],,
AC_CHECK_FUNC([dl_iterate_phdr],,
[AC_SEARCH_LIBS([dl_iterate_phdr],[dl])])
# Check if -Wno-pointer-sign is supported, a lot of ASN1 code needs this due to
# char*/unsigned char* mismatches.
save_cflags="$CFLAGS"
CFLAGS=-Wno-pointer-sign
AC_MSG_CHECKING([whether CC supports -Wno-pointer-sign])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])],
[AC_MSG_RESULT([yes])]
[AM_CFLAGS=-Wno-pointer-sign],
[AC_MSG_RESULT([no])]
)
CFLAGS="$save_cflags $AM_CFLAGS"
# Check for some common compiler flag support
save_cflags="$CFLAGS"
CFLAGS=-Wall
AC_MSG_CHECKING([whether CC supports -Wall])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])],
[AC_MSG_RESULT([yes])]
[AM_CFLAGS=-Wall],
[AC_MSG_RESULT([no])]
)
CFLAGS="$save_cflags $AM_CFLAGS"
save_cflags="$CFLAGS"
CFLAGS=--std=gnu99
AC_MSG_CHECKING([whether CC supports --std=gnu99])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])],
[AC_MSG_RESULT([yes])]
[AM_CFLAGS=--std=gnu99],
[AC_MSG_RESULT([no])]
)
CFLAGS="$save_cflags $AM_CFLAGS"
# Clang needs some workarounds, check for it
AC_MSG_CHECKING([if compiling with clang])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [[
#ifndef __clang__
@ -182,6 +215,7 @@ AS_IF([test "x$enable_hardening" = "xyes"], [
AC_MSG_WARN([compiler does not appear to support stack protection])
)
)
# Make sure we can actually link libssp on Windows platforms.
AS_IF([test "x$HOST_OS" = "xwin"], [
AC_SEARCH_LIBS([__stack_chk_guard],[ssp])
])
@ -196,17 +230,6 @@ LD="$saved_LD"
CFLAGS="$CFLAGS $HARDEN_CFLAGS"
LDFLAGS="$LDFLAGS $HARDEN_LDFLAGS"
# Removing the dependency on -Wno-pointer-sign should be a goal
save_cflags="$CFLAGS"
CFLAGS=-Wno-pointer-sign
AC_MSG_CHECKING([whether CC supports -Wno-pointer-sign])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])],
[AC_MSG_RESULT([yes])]
[AM_CFLAGS=-Wno-pointer-sign],
[AC_MSG_RESULT([no])]
)
CFLAGS="$save_cflags $AM_CFLAGS"
save_cflags="$CFLAGS"
CFLAGS=
AC_MSG_CHECKING([whether AS supports .note.GNU-stack])
@ -217,7 +240,6 @@ __asm__(".section .note.GNU-stack,\"\",@progbits");]])],
[AC_MSG_RESULT([no])]
)
CFLAGS="$save_cflags $AM_CFLAGS"
AM_PROG_AS
AC_CHECK_FUNCS([arc4random_buf asprintf explicit_bzero funopen getauxval])
AC_CHECK_FUNCS([getentropy memmem poll reallocarray])