AC_HEADER_STDC causes a compile failure with autoconf 2.70
From https://www.mail-archive.com/bug-autoconf@gnu.org/msg04408.html > ... the long-obsolete AC_HEADER_STDC, previously used internally by > AC_INCLUDES_DEFAULT, used AC_EGREP_HEADER. The AC_HEADER_STDC macro > is now a no-op (and is not used at all within Autoconf anymore), so > that change is likely what made the first use of AC_EGREP_HEADER the > one inside the if condition, causing the observed results. The implication is that the test does nothing anyway, and due to it being a no-op from 2.70 onwards, results in the required not being set to yes, resulting in ./configure to fail. Change-Id: Ic1ff38d87f791fbf1f2a80512f81bb7110392460 Signed-off-by: Jaco Kroon <jaco@uls.co.za>
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@ -13129,122 +13129,6 @@ if test -z $ac_header_dirent -o "$ac_header_dirent" = "no"; then
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as_fn_error $? "*** Could not find dirent header that defines 'DIR'." "$LINENO" 5
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for ANSI C header files" >&5
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$as_echo_n "checking for ANSI C header files... " >&6; }
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if ${ac_cv_header_stdc+:} false; then :
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$as_echo_n "(cached) " >&6
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else
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cat confdefs.h - <<_ACEOF >conftest.$ac_ext
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/* end confdefs.h. */
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#include <stdlib.h>
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#include <stdarg.h>
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#include <string.h>
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#include <float.h>
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int
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main ()
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{
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;
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return 0;
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}
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_ACEOF
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if ac_fn_c_try_compile "$LINENO"; then :
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ac_cv_header_stdc=yes
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else
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ac_cv_header_stdc=no
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fi
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rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
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if test $ac_cv_header_stdc = yes; then
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# SunOS 4.x string.h does not declare mem*, contrary to ANSI.
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cat confdefs.h - <<_ACEOF >conftest.$ac_ext
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/* end confdefs.h. */
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#include <string.h>
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_ACEOF
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if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
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$EGREP "memchr" >/dev/null 2>&1; then :
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else
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ac_cv_header_stdc=no
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fi
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rm -f conftest*
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fi
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if test $ac_cv_header_stdc = yes; then
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# ISC 2.0.2 stdlib.h does not declare free, contrary to ANSI.
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cat confdefs.h - <<_ACEOF >conftest.$ac_ext
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/* end confdefs.h. */
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#include <stdlib.h>
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_ACEOF
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if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
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$EGREP "free" >/dev/null 2>&1; then :
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else
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ac_cv_header_stdc=no
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fi
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rm -f conftest*
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fi
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if test $ac_cv_header_stdc = yes; then
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# /bin/cc in Irix-4.0.5 gets non-ANSI ctype macros unless using -ansi.
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if test "$cross_compiling" = yes; then :
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:
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else
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cat confdefs.h - <<_ACEOF >conftest.$ac_ext
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/* end confdefs.h. */
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#include <ctype.h>
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#include <stdlib.h>
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#if ((' ' & 0x0FF) == 0x020)
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# define ISLOWER(c) ('a' <= (c) && (c) <= 'z')
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# define TOUPPER(c) (ISLOWER(c) ? 'A' + ((c) - 'a') : (c))
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#else
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# define ISLOWER(c) \
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(('a' <= (c) && (c) <= 'i') \
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|| ('j' <= (c) && (c) <= 'r') \
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|| ('s' <= (c) && (c) <= 'z'))
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# define TOUPPER(c) (ISLOWER(c) ? ((c) | 0x40) : (c))
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#endif
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#define XOR(e, f) (((e) && !(f)) || (!(e) && (f)))
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int
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main ()
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{
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int i;
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for (i = 0; i < 256; i++)
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if (XOR (islower (i), ISLOWER (i))
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|| toupper (i) != TOUPPER (i))
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return 2;
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return 0;
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}
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_ACEOF
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if ac_fn_c_try_run "$LINENO"; then :
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else
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ac_cv_header_stdc=no
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fi
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rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
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conftest.$ac_objext conftest.beam conftest.$ac_ext
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fi
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fi
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_header_stdc" >&5
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$as_echo "$ac_cv_header_stdc" >&6; }
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if test $ac_cv_header_stdc = yes; then
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$as_echo "#define STDC_HEADERS 1" >>confdefs.h
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fi
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if test "$ac_cv_header_stdc" != "yes"; then
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as_fn_error $? "*** ANSI C header files not found." "$LINENO" 5
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for sys/wait.h that is POSIX.1 compatible" >&5
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$as_echo_n "checking for sys/wait.h that is POSIX.1 compatible... " >&6; }
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if ${ac_cv_header_sys_wait_h+:} false; then :
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@ -616,11 +616,6 @@ if test -z $ac_header_dirent -o "$ac_header_dirent" = "no"; then
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AC_MSG_ERROR([*** Could not find dirent header that defines 'DIR'.])
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fi
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AC_HEADER_STDC
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if test "$ac_cv_header_stdc" != "yes"; then
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AC_MSG_ERROR([*** ANSI C header files not found.])
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fi
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AC_HEADER_SYS_WAIT
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if test "$ac_cv_header_sys_wait_h" != "yes"; then
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AC_MSG_ERROR([*** POSIX.1 compatible sys/wait.h is required.])
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