Hi all, Carlos O'Donell wrote on libc-alpha: > http://sourceware.org/glibc/wiki/Testing/Gnulib > > Running the 2.16 release candidate against the gnulib > testsuite has turned up three object files being build > by gnulib that aren't listed in the known issues: > > (a) logf > (b) log10f > (c) remove > (d) strstr
Regarding logf, I tracked it down, thanks to the configure file and related outputs that Carlos provided. The problem occurs only with Autoconf versions < 2.64. Carlos used version 2.63. In the testdir's configure file generated, there are the following lines: 2.63 36684:for ac_func in logf 83846: LOG_LIBM="$POW_LIBM" 88089:for ac_func in logf 2.64 23667: LOG_LIBM="$POW_LIBM" 23977: for ac_func in logf 52057: LOG_LIBM="$POW_LIBM" 54518: for ac_func in logf 2.65 23694: LOG_LIBM="$POW_LIBM" 24004: for ac_func in logf 52084: LOG_LIBM="$POW_LIBM" 54545: for ac_func in logf 2.66 23694: LOG_LIBM="$POW_LIBM" 24004: for ac_func in logf 52071: LOG_LIBM="$POW_LIBM" 54532: for ac_func in logf The 'for ac_func in logf' lines come from AC_CHECK_FUNCS([logf]) inside gl_FUNC_LOGF and is immediately preceded by a use of $LOG_LIBM. This variable LOG_LIBM is meant to be initialized by AC_REQUIRE([gl_FUNC_LOG]), since gl_FUNC_LOG contains gl_COMMON_DOUBLE_MATHFUNC([log]) which expands to 'LOG_LIBM="$POW_LIBM"'. The 'LOG_LIBM="$POW_LIBM"' lines come from the gl_COMMON_DOUBLE_MATHFUNC([log]) in gl_FUNC_LOG. So, there are two copies of gl_FUNC_LOGF in the expansion. In Autoconf version >= 2.64, both are complete with prerequisites. But with Autoconf 2.63, in the first case, the prerequisites are not in the right order. Incidentally, autoconf >= 2.64 also reports a warning: configure.ac:2592: warning: AC_REQUIRE: `gl_FUNC_LOG' was expanded before it was required glm4/logl.m4:7: gl_FUNC_LOGL is expanded from... glm4/log10l.m4:7: gl_FUNC_LOG10L is expanded from... configure.ac:41: gl_INIT is expanded from... configure.ac:2592: the top level The attached patch fixes this warning and leads to a correct configure file with autoconf 2.63. But this warning can reoccur again. We have two choices: (a) Review all AC_REQUIREs in gnulib, and work around the old Autoconf bug in each case, (b) Require Autoconf >= 2.64. The problem with the older Autoconf releases is that they have an AC_REQUIRE ordering bug *and* don't warn. Regarding (a), The list of suspect AC_REQUIREs is as follows: m4/acosf.m4: AC_REQUIRE([gl_FUNC_ACOS]) m4/acosl.m4: AC_REQUIRE([gl_FUNC_ACOS]) m4/acosl.m4: AC_REQUIRE([gl_FUNC_ASINL]) m4/acosl.m4: AC_REQUIRE([gl_FUNC_SQRTL]) m4/asinf.m4: AC_REQUIRE([gl_FUNC_ASIN]) m4/asinl.m4: AC_REQUIRE([gl_FUNC_ASIN]) m4/asinl.m4: AC_REQUIRE([gl_FUNC_SQRTL]) m4/atan2f.m4: AC_REQUIRE([gl_FUNC_ATAN2]) m4/atanf.m4: AC_REQUIRE([gl_FUNC_ATAN]) m4/atanl.m4: AC_REQUIRE([gl_FUNC_ATAN]) m4/atanl.m4: AC_REQUIRE([gl_FUNC_ISNANL]) m4/canonicalize.m4: AC_REQUIRE([gl_FUNC_REALPATH_WORKS]) m4/canonicalize.m4: AC_REQUIRE([gl_FUNC_REALPATH_WORKS]) m4/cbrtf.m4: AC_REQUIRE([gl_FUNC_CBRT]) m4/cbrtf.m4: AC_REQUIRE([gl_FUNC_FABSF]) m4/cbrtf.m4: AC_REQUIRE([gl_FUNC_FREXPF]) m4/cbrtf.m4: AC_REQUIRE([gl_FUNC_LDEXPF]) m4/cbrtl-ieee.m4: AC_REQUIRE([gl_FUNC_CBRTL]) m4/cbrtl.m4: AC_REQUIRE([gl_FUNC_CBRT]) m4/cbrtl.m4: AC_REQUIRE([gl_FUNC_FREXPL]) m4/cbrtl.m4: AC_REQUIRE([gl_FUNC_LDEXPL]) m4/cbrt.m4: AC_REQUIRE([gl_FUNC_FABS]) m4/cbrt.m4: AC_REQUIRE([gl_FUNC_FREXP]) m4/cbrt.m4: AC_REQUIRE([gl_FUNC_LDEXP]) m4/ceilf-ieee.m4: AC_REQUIRE([gl_FUNC_CEILF]) m4/ceil-ieee.m4: AC_REQUIRE([gl_FUNC_CEIL]) m4/ceill-ieee.m4: AC_REQUIRE([gl_FUNC_CEILL]) m4/ceill.m4: AC_REQUIRE([gl_FUNC_CEIL]) m4/chown.m4: AC_REQUIRE([gl_FUNC_CHOWN_FOLLOWS_SYMLINK]) m4/copysignl.m4: AC_REQUIRE([gl_FUNC_COPYSIGN]) m4/cosf.m4: AC_REQUIRE([gl_FUNC_COS]) m4/coshf.m4: AC_REQUIRE([gl_FUNC_COSH]) m4/cosl.m4: AC_REQUIRE([gl_FUNC_COS]) m4/cosl.m4: AC_REQUIRE([gl_FUNC_FLOOR]) m4/cosl.m4: AC_REQUIRE([gl_FUNC_FLOORL]) m4/cosl.m4: AC_REQUIRE([gl_FUNC_ISNANL]) m4/euidaccess.m4: AC_REQUIRE([gl_FUNC_EUIDACCESS]) m4/exp2f.m4: AC_REQUIRE([gl_FUNC_EXP2]) m4/exp2l-ieee.m4: AC_REQUIRE([gl_FUNC_EXP2L]) m4/exp2l.m4: AC_REQUIRE([gl_FUNC_EXP2]) m4/exp2l.m4: AC_REQUIRE([gl_FUNC_ISNANL]) m4/exp2l.m4: AC_REQUIRE([gl_FUNC_LDEXPL]) m4/exp2l.m4: AC_REQUIRE([gl_FUNC_ROUNDL]) m4/exp2.m4: AC_REQUIRE([gl_FUNC_ISNAND]) m4/exp2.m4: AC_REQUIRE([gl_FUNC_LDEXP]) m4/exp2.m4: AC_REQUIRE([gl_FUNC_ROUND]) m4/expf.m4: AC_REQUIRE([gl_FUNC_EXP]) m4/expl.m4: AC_REQUIRE([gl_FUNC_EXP]) m4/expl.m4: AC_REQUIRE([gl_FUNC_ISNANL]) m4/expl.m4: AC_REQUIRE([gl_FUNC_LDEXPL]) m4/expl.m4: AC_REQUIRE([gl_FUNC_ROUNDL]) m4/expm1f.m4: AC_REQUIRE([gl_FUNC_EXPM1]) m4/expm1-ieee.m4: AC_REQUIRE([gl_FUNC_EXPM1]) m4/expm1l.m4: AC_REQUIRE([gl_FUNC_EXPL]) m4/expm1l.m4: AC_REQUIRE([gl_FUNC_EXPM1]) m4/expm1l.m4: AC_REQUIRE([gl_FUNC_ISNANL]) m4/expm1l.m4: AC_REQUIRE([gl_FUNC_LDEXPL]) m4/expm1l.m4: AC_REQUIRE([gl_FUNC_ROUNDL]) m4/expm1.m4: AC_REQUIRE([gl_FUNC_EXP]) m4/expm1.m4: AC_REQUIRE([gl_FUNC_ISNAND]) m4/expm1.m4: AC_REQUIRE([gl_FUNC_LDEXP]) m4/expm1.m4: AC_REQUIRE([gl_FUNC_ROUND]) m4/fabsf.m4: AC_REQUIRE([gl_FUNC_FABS]) m4/fabsl.m4: AC_REQUIRE([gl_FUNC_FABS]) m4/fchownat.m4: AC_REQUIRE([gl_FUNC_CHOWN]) m4/fclose.m4: AC_REQUIRE([gl_FUNC_CLOSE]) m4/findprog.m4: AC_REQUIRE([gl_FUNC_EACCESS]) m4/floorf-ieee.m4: AC_REQUIRE([gl_FUNC_FLOORF]) m4/floor-ieee.m4: AC_REQUIRE([gl_FUNC_FLOOR]) m4/floorl.m4: AC_REQUIRE([gl_FUNC_FLOOR]) m4/fmaf.m4: AC_REQUIRE([gl_FUNC_FEGETROUND]) m4/fmaf.m4: AC_REQUIRE([gl_FUNC_FREXPF]) m4/fmaf.m4: AC_REQUIRE([gl_FUNC_LDEXPF]) m4/fmaf.m4: AC_REQUIRE([gl_FUNC_LDEXPF]) m4/fmal.m4: AC_REQUIRE([gl_FUNC_FEGETROUND]) m4/fmal.m4: AC_REQUIRE([gl_FUNC_FMA]) m4/fmal.m4: AC_REQUIRE([gl_FUNC_FREXPL]) m4/fmal.m4: AC_REQUIRE([gl_FUNC_LDEXPL]) m4/fmal.m4: AC_REQUIRE([gl_FUNC_LDEXPL]) m4/fma.m4: AC_REQUIRE([gl_FUNC_FEGETROUND]) m4/fma.m4: AC_REQUIRE([gl_FUNC_FREXP]) m4/fma.m4: AC_REQUIRE([gl_FUNC_LDEXP]) m4/fma.m4: AC_REQUIRE([gl_FUNC_LDEXP]) m4/fmodf-ieee.m4: AC_REQUIRE([gl_FUNC_FMODF]) m4/fmodf.m4: AC_REQUIRE([gl_FUNC_FMOD]) m4/fmod-ieee.m4: AC_REQUIRE([gl_FUNC_FMOD]) m4/fmodl-ieee.m4: AC_REQUIRE([gl_FUNC_FMODL]) m4/fmodl.m4: AC_REQUIRE([gl_FUNC_FABSL]) m4/fmodl.m4: AC_REQUIRE([gl_FUNC_FMOD]) m4/fmodl.m4: AC_REQUIRE([gl_FUNC_FREXPL]) m4/fmodl.m4: AC_REQUIRE([gl_FUNC_ISNANL]) m4/fmodl.m4: AC_REQUIRE([gl_FUNC_LDEXPL]) m4/fmodl.m4: AC_REQUIRE([gl_FUNC_TRUNCL]) m4/fmod.m4: AC_REQUIRE([gl_FUNC_FABS]) m4/fmod.m4: AC_REQUIRE([gl_FUNC_FREXP]) m4/fmod.m4: AC_REQUIRE([gl_FUNC_ISNAND]) m4/fmod.m4: AC_REQUIRE([gl_FUNC_LDEXP]) m4/fmod.m4: AC_REQUIRE([gl_FUNC_TRUNC]) m4/fnmatch.m4: AC_REQUIRE([gl_FUNC_FNMATCH_POSIX]) m4/frexpf.m4: AC_REQUIRE([gl_FUNC_FREXP]) m4/frexpl.m4: AC_REQUIRE([gl_FUNC_FREXP]) m4/fseek.m4: AC_REQUIRE([gl_FUNC_FSEEKO]) m4/fstatat.m4: AC_REQUIRE([gl_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK]) m4/ftell.m4: AC_REQUIRE([gl_FUNC_FTELLO]) m4/getaddrinfo.m4: AC_REQUIRE([gl_FUNC_INET_NTOP]) dnl for INET_NTOP_LIB m4/getcwd.m4: AC_REQUIRE([gl_FUNC_GETCWD_NULL]) m4/getcwd.m4: AC_REQUIRE([gl_FUNC_GETCWD_NULL]) m4/getcwd.m4: AC_REQUIRE([gl_FUNC_GETCWD_SIGNATURE]) m4/getcwd.m4: AC_REQUIRE([gl_FUNC_GETCWD_SIGNATURE]) m4/getopt.m4: AC_REQUIRE([gl_FUNC_GETOPT_POSIX]) m4/hypotf-ieee.m4: AC_REQUIRE([gl_FUNC_HYPOTF]) m4/hypotf.m4: AC_REQUIRE([gl_FUNC_HYPOT]) m4/hypot-ieee.m4: AC_REQUIRE([gl_FUNC_HYPOT]) m4/hypotl-ieee.m4: AC_REQUIRE([gl_FUNC_HYPOTL]) m4/hypotl.m4: AC_REQUIRE([gl_FUNC_FABSL]) m4/hypotl.m4: AC_REQUIRE([gl_FUNC_FREXPL]) m4/hypotl.m4: AC_REQUIRE([gl_FUNC_HYPOT]) m4/hypotl.m4: AC_REQUIRE([gl_FUNC_LDEXPL]) m4/hypotl.m4: AC_REQUIRE([gl_FUNC_SQRTL]) m4/hypot.m4: AC_REQUIRE([gl_FUNC_FABS]) m4/hypot.m4: AC_REQUIRE([gl_FUNC_FREXP]) m4/hypot.m4: AC_REQUIRE([gl_FUNC_LDEXP]) m4/hypot.m4: AC_REQUIRE([gl_FUNC_SQRT]) m4/iconv_open-utf.m4: dnl *Not* AC_REQUIRE([gl_FUNC_ICONV_OPEN]). m4/ilogbf.m4: AC_REQUIRE([gl_FUNC_FREXPF]) m4/ilogbf.m4: AC_REQUIRE([gl_FUNC_ISNANF]) m4/ilogbl.m4: AC_REQUIRE([gl_FUNC_FREXPL]) m4/ilogbl.m4: AC_REQUIRE([gl_FUNC_ILOGB]) m4/ilogbl.m4: AC_REQUIRE([gl_FUNC_ISNANL]) m4/ilogb.m4: AC_REQUIRE([gl_FUNC_FREXP]) m4/ilogb.m4: AC_REQUIRE([gl_FUNC_ISNAND]) m4/isnan.m4: AC_REQUIRE([gl_FUNC_ISNAND]) m4/isnan.m4: AC_REQUIRE([gl_FUNC_ISNANF]) m4/isnan.m4: AC_REQUIRE([gl_FUNC_ISNANL]) m4/lchown.m4: AC_REQUIRE([gl_FUNC_CHOWN]) m4/ldexpf.m4: AC_REQUIRE([gl_FUNC_LDEXP]) m4/ldexpl.m4: AC_REQUIRE([gl_FUNC_ISNANL]) dnl for ISNANL_LIBM m4/ldexpl.m4: AC_REQUIRE([gl_FUNC_LDEXP]) m4/linkat.m4: AC_REQUIRE([gl_FUNC_LINK_FOLLOWS_SYMLINK]) m4/linkat.m4: AC_REQUIRE([gl_FUNC_OPENAT]) m4/log10f-ieee.m4: AC_REQUIRE([gl_FUNC_LOG10F]) m4/log10f.m4: AC_REQUIRE([gl_FUNC_LOG10]) m4/log10-ieee.m4: AC_REQUIRE([gl_FUNC_LOG10]) m4/log10l.m4: AC_REQUIRE([gl_FUNC_LOG10]) m4/log10l.m4: AC_REQUIRE([gl_FUNC_LOGL]) m4/log1pf-ieee.m4: AC_REQUIRE([gl_FUNC_LOG1PF]) m4/log1pf.m4: AC_REQUIRE([gl_FUNC_LOG1P]) m4/log1p-ieee.m4: AC_REQUIRE([gl_FUNC_LOG1P]) m4/log1pl-ieee.m4: AC_REQUIRE([gl_FUNC_LOG1PL]) m4/log1pl.m4: AC_REQUIRE([gl_FUNC_ISNANL]) m4/log1pl.m4: AC_REQUIRE([gl_FUNC_LOG1P]) m4/log1pl.m4: AC_REQUIRE([gl_FUNC_LOGL]) m4/log1pl.m4: AC_REQUIRE([gl_FUNC_ROUNDL]) m4/log1p.m4: AC_REQUIRE([gl_FUNC_ISNAND]) m4/log1p.m4: AC_REQUIRE([gl_FUNC_LOG]) m4/log1p.m4: AC_REQUIRE([gl_FUNC_ROUND]) m4/log2f-ieee.m4: AC_REQUIRE([gl_FUNC_LOG2F]) m4/log2f.m4: AC_REQUIRE([gl_FUNC_FREXPF]) m4/log2f.m4: AC_REQUIRE([gl_FUNC_ISNANF]) m4/log2f.m4: AC_REQUIRE([gl_FUNC_LOG2]) m4/log2f.m4: AC_REQUIRE([gl_FUNC_LOGF]) m4/log2-ieee.m4: AC_REQUIRE([gl_FUNC_LOG2]) m4/log2l.m4: AC_REQUIRE([gl_FUNC_FREXPL]) m4/log2l.m4: AC_REQUIRE([gl_FUNC_ISNANL]) m4/log2l.m4: AC_REQUIRE([gl_FUNC_LOG2]) m4/log2l.m4: AC_REQUIRE([gl_FUNC_LOGL]) m4/log2.m4: AC_REQUIRE([gl_FUNC_FREXP]) m4/log2.m4: AC_REQUIRE([gl_FUNC_ISNAND]) m4/log2.m4: AC_REQUIRE([gl_FUNC_LOG]) m4/logbf.m4: AC_REQUIRE([gl_FUNC_FREXPF]) m4/logbf.m4: AC_REQUIRE([gl_FUNC_ISNANF]) m4/logbl.m4: AC_REQUIRE([gl_FUNC_FREXPL]) m4/logbl.m4: AC_REQUIRE([gl_FUNC_ISNANL]) m4/logbl.m4: AC_REQUIRE([gl_FUNC_LOGB]) m4/logb.m4: AC_REQUIRE([gl_FUNC_FREXP]) m4/logb.m4: AC_REQUIRE([gl_FUNC_ISNAND]) m4/logf-ieee.m4: AC_REQUIRE([gl_FUNC_LOGF]) m4/logf.m4: AC_REQUIRE([gl_FUNC_LOG]) m4/log-ieee.m4: AC_REQUIRE([gl_FUNC_LOG]) m4/logl.m4: AC_REQUIRE([gl_FUNC_FLOORL]) m4/logl.m4: AC_REQUIRE([gl_FUNC_FREXPL]) m4/logl.m4: AC_REQUIRE([gl_FUNC_ISNANL]) m4/logl.m4: AC_REQUIRE([gl_FUNC_LOG]) m4/lstat.m4: AC_REQUIRE([gl_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK]) m4/mbrlen.m4: AC_REQUIRE([gl_FUNC_MBRTOWC]) m4/memmem.m4: AC_REQUIRE([gl_FUNC_MEMMEM_SIMPLE]) m4/mkfifoat.m4: AC_REQUIRE([gl_FUNC_OPENAT]) m4/mknod.m4: AC_REQUIRE([gl_FUNC_MKFIFO]) m4/mktime.m4: AC_REQUIRE([gl_FUNC_MKTIME]) m4/modff-ieee.m4: AC_REQUIRE([gl_FUNC_MODFF]) m4/modff.m4: AC_REQUIRE([gl_FUNC_MODF]) m4/modf-ieee.m4: AC_REQUIRE([gl_FUNC_MODF]) m4/modfl-ieee.m4: AC_REQUIRE([gl_FUNC_MODFL]) m4/modfl.m4: AC_REQUIRE([gl_FUNC_MODF]) m4/modfl.m4: AC_REQUIRE([gl_FUNC_TRUNCL]) m4/modf.m4: AC_REQUIRE([gl_FUNC_TRUNC]) m4/nanosleep.m4: AC_REQUIRE([gl_FUNC_SELECT]) m4/openat.m4: AC_REQUIRE([gl_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK]) m4/pagealign_alloc.m4: AC_REQUIRE([gl_FUNC_MMAP_ANON]) m4/perror.m4: AC_REQUIRE([gl_FUNC_STRERROR_0]) m4/perror.m4: AC_REQUIRE([gl_FUNC_STRERROR_R]) m4/powf.m4: AC_REQUIRE([gl_FUNC_POW]) m4/printf-posix-rpl.m4: AC_REQUIRE([gl_FUNC_VFPRINTF_POSIX]) m4/readlinkat.m4: AC_REQUIRE([gl_FUNC_OPENAT]) m4/remainderf-ieee.m4: AC_REQUIRE([gl_FUNC_REMAINDERF]) m4/remainderf.m4: AC_REQUIRE([gl_FUNC_FABSF]) m4/remainderf.m4: AC_REQUIRE([gl_FUNC_FMODF]) m4/remainderf.m4: AC_REQUIRE([gl_FUNC_ISNANF]) m4/remainderf.m4: AC_REQUIRE([gl_FUNC_REMAINDER]) m4/remainder-ieee.m4: AC_REQUIRE([gl_FUNC_REMAINDER]) m4/remainderl-ieee.m4: AC_REQUIRE([gl_FUNC_REMAINDERL]) m4/remainderl.m4: AC_REQUIRE([gl_FUNC_FABSL]) m4/remainderl.m4: AC_REQUIRE([gl_FUNC_FMODL]) m4/remainderl.m4: AC_REQUIRE([gl_FUNC_ISNANL]) m4/remainderl.m4: AC_REQUIRE([gl_FUNC_REMAINDER]) m4/remainder.m4: AC_REQUIRE([gl_FUNC_FABS]) m4/remainder.m4: AC_REQUIRE([gl_FUNC_FMOD]) m4/remainder.m4: AC_REQUIRE([gl_FUNC_ISNAND]) m4/remove.m4: AC_REQUIRE([gl_FUNC_RMDIR]) m4/remove.m4: AC_REQUIRE([gl_FUNC_UNLINK]) m4/renameat.m4: AC_REQUIRE([gl_FUNC_OPENAT]) m4/renameat.m4: AC_REQUIRE([gl_FUNC_RENAME]) m4/rintl.m4: AC_REQUIRE([gl_FUNC_RINT]) m4/roundf-ieee.m4: AC_REQUIRE([gl_FUNC_ROUNDF]) m4/round-ieee.m4: AC_REQUIRE([gl_FUNC_ROUND]) m4/roundl-ieee.m4: AC_REQUIRE([gl_FUNC_ROUNDL]) m4/roundl.m4: AC_REQUIRE([gl_FUNC_ROUND]) m4/setenv.m4: AC_REQUIRE([gl_FUNC_SETENV_SEPARATE]) m4/sinf.m4: AC_REQUIRE([gl_FUNC_SIN]) m4/sinhf.m4: AC_REQUIRE([gl_FUNC_SINH]) m4/sinl.m4: AC_REQUIRE([gl_FUNC_FLOOR]) m4/sinl.m4: AC_REQUIRE([gl_FUNC_FLOORL]) m4/sinl.m4: AC_REQUIRE([gl_FUNC_ISNANL]) m4/sinl.m4: AC_REQUIRE([gl_FUNC_SIN]) m4/sqrtf.m4: AC_REQUIRE([gl_FUNC_SQRT]) m4/sqrtl.m4: AC_REQUIRE([gl_FUNC_FREXPL]) m4/sqrtl.m4: AC_REQUIRE([gl_FUNC_ISNANL]) m4/sqrtl.m4: AC_REQUIRE([gl_FUNC_LDEXPL]) m4/sqrtl.m4: AC_REQUIRE([gl_FUNC_SQRT]) m4/sqrtl.m4: AC_REQUIRE([gl_FUNC_SQRT]) m4/strcasestr.m4: AC_REQUIRE([gl_FUNC_MEMCHR]) m4/strcasestr.m4: AC_REQUIRE([gl_FUNC_STRCASESTR_SIMPLE]) m4/strerror.m4: AC_REQUIRE([gl_FUNC_STRERROR_0]) m4/strerror.m4: AC_REQUIRE([gl_FUNC_STRERROR_R_WORKS]) m4/strerror_r.m4: AC_REQUIRE([gl_FUNC_STRERROR_0]) m4/strerror_r.m4: AC_REQUIRE([gl_FUNC_STRERROR_R_WORKS]) m4/strstr.m4: AC_REQUIRE([gl_FUNC_MEMCHR]) m4/strstr.m4: AC_REQUIRE([gl_FUNC_STRSTR_SIMPLE]) m4/symlinkat.m4: AC_REQUIRE([gl_FUNC_OPENAT]) m4/tanf.m4: AC_REQUIRE([gl_FUNC_TAN]) m4/tanhf.m4: AC_REQUIRE([gl_FUNC_TANH]) m4/tanl.m4: AC_REQUIRE([gl_FUNC_FLOOR]) m4/tanl.m4: AC_REQUIRE([gl_FUNC_FLOORL]) m4/tanl.m4: AC_REQUIRE([gl_FUNC_ISNANL]) m4/tanl.m4: AC_REQUIRE([gl_FUNC_TAN]) m4/timegm.m4: AC_REQUIRE([gl_FUNC_MKTIME]) m4/truncf-ieee.m4: AC_REQUIRE([gl_FUNC_TRUNCF]) m4/trunc-ieee.m4: AC_REQUIRE([gl_FUNC_TRUNC]) m4/truncl-ieee.m4: AC_REQUIRE([gl_FUNC_TRUNCL]) m4/truncl.m4: AC_REQUIRE([gl_FUNC_TRUNC]) m4/unlinkat.m4: AC_REQUIRE([gl_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK]) m4/unlinkat.m4: AC_REQUIRE([gl_FUNC_UNLINK]) m4/utimecmp.m4: AC_REQUIRE([gl_FUNC_UTIMES]) m4/utimens.m4: AC_REQUIRE([gl_FUNC_UTIMES]) m4/vprintf-posix.m4: AC_REQUIRE([gl_FUNC_VFPRINTF_POSIX]) m4/wcswidth.m4: AC_REQUIRE([gl_FUNC_WCWIDTH]) This is quite some work, just for a workaround. Additionally, transforming an gl_FUNC_FOO to AC_REQUIRE([gl_FUNC_FOO]) somewhat defeats the conditional dependencies: gl_FUNC_FOO will be executed, regardless whether module 'foo' is actually needed on the given platform or not. Regarding option (b), note that Automake 1.13 will already require Autoconf >= 2.65. Here are the release dates of autoconf: 2.63 2008-09-09 2.64 2009-07-26 2.65 2009-11-21 2.66 2010-07-02 So, version 2.64 is already nearly 3 years old. I would therefore propose (b), that is, to bump the required Autoconf version in the DEPENDENCIES file and gnulib-tool to 2.64. Opinions? Objections? 2012-07-01 Bruno Haible <br...@clisp.org> log: Fix an autoconf >= 2.64 warning. * modules/log (configure.ac): Require, not invoke, gl_FUNC_LOG. Reported by Carlos O'Donell <carlos_odon...@mentor.com>. --- modules/log.orig Mon Jul 2 01:11:59 2012 +++ modules/log Mon Jul 2 01:10:03 2012 @@ -10,7 +10,7 @@ math configure.ac: -gl_FUNC_LOG +AC_REQUIRE([gl_FUNC_LOG]) if test $REPLACE_LOG = 1; then AC_LIBOBJ([log]) fi