dnl authorization. *
dnl***************************************************************************
dnl
-dnl $Id: aclocal.m4,v 1.128 2016/05/21 22:22:24 tom Exp $
+dnl $Id: aclocal.m4,v 1.135 2016/09/10 22:09:38 tom Exp $
dnl
dnl Author: Thomas E. Dickey
dnl
])dnl
])])dnl
dnl ---------------------------------------------------------------------------
-dnl CF_CC_ENV_FLAGS version: 3 updated: 2016/05/21 18:10:17
+dnl CF_CC_ENV_FLAGS version: 6 updated: 2016/08/29 20:57:00
dnl ---------------
dnl Check for user's environment-breakage by stuffing CFLAGS/CPPFLAGS content
-dnl into CC. This will not help with broken scripts that wrap the compiler with
-dnl options, but eliminates a more common category of user confusion.
+dnl into CC. This will not help with broken scripts that wrap the compiler
+dnl with options, but eliminates a more common category of user confusion.
+dnl
+dnl In particular, it addresses the problem of being able to run the C
+dnl preprocessor in a consistent manner.
dnl
dnl Caveat: this also disallows blanks in the pathname for the compiler, but
dnl the nuisance of having inconsistent settings for compiler and preprocessor
AC_MSG_RESULT(broken)
AC_MSG_WARN(your environment misuses the CC variable to hold CFLAGS/CPPFLAGS options)
# humor him...
- cf_flags=`echo "$CC" | sed -e 's/^[[^ ]]*[[ ]][[ ]]*//'`
- CC=`echo "$CC" | sed -e 's/[[ ]].*//'`
- CF_ADD_CFLAGS($cf_flags)
+ cf_flags=`echo "$CC" | sed -e 's/^.*[[ ]]\(-[[^ ]]\)/\1/'`
+ CC=`echo "$CC " | sed -e 's/[[ ]]-[[^ ]].*$//' -e 's/[[ ]]*$//'`
+ for cf_arg in $cf_flags
+ do
+ case "x$cf_arg" in
+ (x-[[IUDfgOW]]*)
+ CF_ADD_CFLAGS($cf_flags)
+ ;;
+ (*)
+ CC="$CC $cf_arg"
+ ;;
+ esac
+ done
CF_VERBOSE(resulting CC: '$CC')
CF_VERBOSE(resulting CFLAGS: '$CFLAGS')
CF_VERBOSE(resulting CPPFLAGS: '$CPPFLAGS')
fi
])
dnl ---------------------------------------------------------------------------
+dnl CF_ENABLE_STRING_HACKS version: 4 updated: 2016/09/10 15:33:21
+dnl ----------------------
+dnl On a few platforms, the compiler and/or loader nags with untruthful
+dnl comments stating that "most" uses of strcat/strcpy/sprintf are incorrect,
+dnl and implying that most uses of the recommended alternatives are correct.
+dnl
+dnl Factually speaking, no one has actually counted the number of uses of these
+dnl functions versus the total of incorrect uses. Samples of a few thousand
+dnl instances are meaningless compared to the hundreds of millions of lines of
+dnl existing C code.
+dnl
+dnl strlcat/strlcpy are (as of 2012) non-standard, and are available on some
+dnl platforms, in implementations of varying quality. Likewise, snprintf is
+dnl standard - but evolved through phases, and older implementations are likely
+dnl to yield surprising results, as documented in manpages on various systems.
+AC_DEFUN([CF_ENABLE_STRING_HACKS],
+[
+AC_MSG_CHECKING(if you want to work around bogus compiler/loader warnings)
+AC_ARG_ENABLE(string-hacks,
+ [ --enable-string-hacks work around bogus compiler/loader warnings],
+ [with_string_hacks=$enableval],
+ [with_string_hacks=no])
+AC_MSG_RESULT($with_string_hacks)
+
+if test "x$with_string_hacks" = "xyes"; then
+ AC_DEFINE(USE_STRING_HACKS,1,[Define to 1 to work around bogus compiler/loader warnings])
+ AC_MSG_WARN(enabling string-hacks to work around bogus compiler/loader warnings)
+ AC_CHECK_FUNC(strlcat,,[
+ AC_CHECK_LIB(bsd,strlcat,[
+ CF_ADD_LIB(bsd)
+ AC_CHECK_HEADERS(bsd/string.h)
+ AC_DEFINE(HAVE_STRLCAT,1,[Define to 1 if we have strlcat function])
+ ])
+ ])
+ AC_CHECK_FUNCS( strlcpy snprintf )
+fi
+])dnl
+dnl ---------------------------------------------------------------------------
dnl CF_ENABLE_WARNINGS version: 4 updated: 2009/07/26 17:53:03
dnl ------------------
dnl Configure-option to enable gcc warnings
fi
])dnl
dnl ---------------------------------------------------------------------------
-dnl CF_GNU_SOURCE version: 6 updated: 2005/07/09 13:23:07
+dnl CF_GNU_SOURCE version: 7 updated: 2016/08/05 05:15:37
dnl -------------
dnl Check if we must define _GNU_SOURCE to get a reasonable value for
dnl _XOPEN_SOURCE, upon which many POSIX definitions depend. This is a defect
CPPFLAGS="$cf_save"
])
])
-test "$cf_cv_gnu_source" = yes && CPPFLAGS="$CPPFLAGS -D_GNU_SOURCE"
+
+if test "$cf_cv_gnu_source" = yes
+then
+AC_CACHE_CHECK(if we should also define _DEFAULT_SOURCE,cf_cv_default_source,[
+CPPFLAGS="$CPPFLAGS -D_GNU_SOURCE"
+ AC_TRY_COMPILE([#include <sys/types.h>],[
+#ifdef _DEFAULT_SOURCE
+make an error
+#endif],
+ [cf_cv_default_source=no],
+ [cf_cv_default_source=yes])
+ ])
+test "$cf_cv_default_source" = yes && CPPFLAGS="$CPPFLAGS -D_DEFAULT_SOURCE"
+fi
])dnl
dnl ---------------------------------------------------------------------------
dnl CF_HEADER_PATH version: 13 updated: 2015/04/15 19:08:48
esac
])dnl
dnl ---------------------------------------------------------------------------
-dnl CF_PROG_LINT version: 2 updated: 2009/08/12 04:43:14
+dnl CF_PROG_LINT version: 3 updated: 2016/05/22 15:25:54
dnl ------------
AC_DEFUN([CF_PROG_LINT],
[
-AC_CHECK_PROGS(LINT, tdlint lint alint splint lclint)
+AC_CHECK_PROGS(LINT, lint cppcheck splint)
AC_SUBST(LINT_OPTS)
])dnl
dnl ---------------------------------------------------------------------------
])dnl
dnl ---------------------------------------------------------------------------
-dnl CF_XOPEN_SOURCE version: 50 updated: 2015/10/17 19:03:33
+dnl CF_XOPEN_SOURCE version: 52 updated: 2016/08/27 12:21:42
dnl ---------------
dnl Try to get _XOPEN_SOURCE defined properly that we can use POSIX functions,
dnl or adapt to the vendor's definitions to get equivalent functionality,
(aix[[4-7]]*)
cf_xopen_source="-D_ALL_SOURCE"
;;
-(cygwin|msys)
+(msys)
cf_XOPEN_SOURCE=600
;;
(darwin[[0-8]].*)
cf_xopen_source="-D_SGI_SOURCE"
cf_XOPEN_SOURCE=
;;
-(linux*|gnu*|mint*|k*bsd*-gnu)
+(linux*|uclinux*|gnu*|mint*|k*bsd*-gnu|cygwin)
CF_GNU_SOURCE
;;
(minix*)
(openbsd*)
# setting _XOPEN_SOURCE breaks xterm on OpenBSD 2.8, is not needed for ncursesw
;;
-(os2*)
- cf_XOPEN_SOURCE=
- ;;
(osf[[45]]*)
cf_xopen_source="-D_OSF_SOURCE"
;;
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