diff options
| -rw-r--r-- | lib/gnulib.mk.in | 6 | ||||
| -rw-r--r-- | lib/string.in.h | 24 | ||||
| -rw-r--r-- | lib/verify.h | 45 | ||||
| -rw-r--r-- | m4/include_next.m4 | 18 | ||||
| -rw-r--r-- | m4/stdint.m4 | 18 | ||||
| -rw-r--r-- | m4/string_h.m4 | 89 | ||||
| -rw-r--r-- | m4/time_rz.m4 | 14 |
7 files changed, 111 insertions, 103 deletions
diff --git a/lib/gnulib.mk.in b/lib/gnulib.mk.in index f564d501222..9953198fb31 100644 --- a/lib/gnulib.mk.in +++ b/lib/gnulib.mk.in @@ -442,6 +442,7 @@ GNULIB_STRCASESTR = @GNULIB_STRCASESTR@ GNULIB_STRCHRNUL = @GNULIB_STRCHRNUL@ GNULIB_STRDUP = @GNULIB_STRDUP@ GNULIB_STRERROR = @GNULIB_STRERROR@ +GNULIB_STRERRORNAME_NP = @GNULIB_STRERRORNAME_NP@ GNULIB_STRERROR_R = @GNULIB_STRERROR_R@ GNULIB_STRFTIME = @GNULIB_STRFTIME@ GNULIB_STRNCAT = @GNULIB_STRNCAT@ @@ -662,6 +663,7 @@ HAVE_STPCPY = @HAVE_STPCPY@ HAVE_STPNCPY = @HAVE_STPNCPY@ HAVE_STRCASESTR = @HAVE_STRCASESTR@ HAVE_STRCHRNUL = @HAVE_STRCHRNUL@ +HAVE_STRERRORNAME_NP = @HAVE_STRERRORNAME_NP@ HAVE_STRPBRK = @HAVE_STRPBRK@ HAVE_STRPTIME = @HAVE_STRPTIME@ HAVE_STRSEP = @HAVE_STRSEP@ @@ -965,6 +967,7 @@ REPLACE_STRCASESTR = @REPLACE_STRCASESTR@ REPLACE_STRCHRNUL = @REPLACE_STRCHRNUL@ REPLACE_STRDUP = @REPLACE_STRDUP@ REPLACE_STRERROR = @REPLACE_STRERROR@ +REPLACE_STRERRORNAME_NP = @REPLACE_STRERRORNAME_NP@ REPLACE_STRERROR_R = @REPLACE_STRERROR_R@ REPLACE_STRFTIME = @REPLACE_STRFTIME@ REPLACE_STRNCAT = @REPLACE_STRNCAT@ @@ -2859,6 +2862,7 @@ string.h: string.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H -e 's/@''GNULIB_STRTOK_R''@/$(GNULIB_STRTOK_R)/g' \ -e 's/@''GNULIB_STRERROR''@/$(GNULIB_STRERROR)/g' \ -e 's/@''GNULIB_STRERROR_R''@/$(GNULIB_STRERROR_R)/g' \ + -e 's/@''GNULIB_STRERRORNAME_NP''@/$(GNULIB_STRERRORNAME_NP)/g' \ -e 's/@''GNULIB_SIGABBREV_NP''@/$(GNULIB_SIGABBREV_NP)/g' \ -e 's/@''GNULIB_SIGDESCR_NP''@/$(GNULIB_SIGDESCR_NP)/g' \ -e 's/@''GNULIB_STRSIGNAL''@/$(GNULIB_STRSIGNAL)/g' \ @@ -2883,6 +2887,7 @@ string.h: string.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H -e 's|@''HAVE_STRCASESTR''@|$(HAVE_STRCASESTR)|g' \ -e 's|@''HAVE_DECL_STRTOK_R''@|$(HAVE_DECL_STRTOK_R)|g' \ -e 's|@''HAVE_DECL_STRERROR_R''@|$(HAVE_DECL_STRERROR_R)|g' \ + -e 's|@''HAVE_STRERRORNAME_NP''@|$(HAVE_STRERRORNAME_NP)|g' \ -e 's|@''HAVE_SIGABBREV_NP''@|$(HAVE_SIGABBREV_NP)|g' \ -e 's|@''HAVE_SIGDESCR_NP''@|$(HAVE_SIGDESCR_NP)|g' \ -e 's|@''HAVE_DECL_STRSIGNAL''@|$(HAVE_DECL_STRSIGNAL)|g' \ @@ -2900,6 +2905,7 @@ string.h: string.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H -e 's|@''REPLACE_STRTOK_R''@|$(REPLACE_STRTOK_R)|g' \ -e 's|@''REPLACE_STRERROR''@|$(REPLACE_STRERROR)|g' \ -e 's|@''REPLACE_STRERROR_R''@|$(REPLACE_STRERROR_R)|g' \ + -e 's|@''REPLACE_STRERRORNAME_NP''@|$(REPLACE_STRERRORNAME_NP)|g' \ -e 's|@''REPLACE_STRSIGNAL''@|$(REPLACE_STRSIGNAL)|g' \ -e 's|@''UNDEFINE_STRTOK_R''@|$(UNDEFINE_STRTOK_R)|g' \ -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \ diff --git a/lib/string.in.h b/lib/string.in.h index 776133c5eba..9724addef43 100644 --- a/lib/string.in.h +++ b/lib/string.in.h @@ -1045,6 +1045,30 @@ _GL_WARN_ON_USE (strerror_r, "strerror_r is unportable - " # endif #endif +/* Return the name of the system error code ERRNUM. */ +#if @GNULIB_STRERRORNAME_NP@ +# if @REPLACE_STRERRORNAME_NP@ +# if !(defined __cplusplus && defined GNULIB_NAMESPACE) +# undef strerrorname_np +# define strerrorname_np rpl_strerrorname_np +# endif +_GL_FUNCDECL_RPL (strerrorname_np, const char *, (int errnum)); +_GL_CXXALIAS_RPL (strerrorname_np, const char *, (int errnum)); +# else +# if !@HAVE_STRERRORNAME_NP@ +_GL_FUNCDECL_SYS (strerrorname_np, const char *, (int errnum)); +# endif +_GL_CXXALIAS_SYS (strerrorname_np, const char *, (int errnum)); +# endif +_GL_CXXALIASWARN (strerrorname_np); +#elif defined GNULIB_POSIXCHECK +# undef strerrorname_np +# if HAVE_RAW_DECL_STRERRORNAME_NP +_GL_WARN_ON_USE (strerrorname_np, "strerrorname_np is unportable - " + "use gnulib module strerrorname_np for portability"); +# endif +#endif + /* Return an abbreviation string for the signal number SIG. */ #if @GNULIB_SIGABBREV_NP@ # if ! @HAVE_SIGABBREV_NP@ diff --git a/lib/verify.h b/lib/verify.h index ca2a1540736..fa1ed717d0e 100644 --- a/lib/verify.h +++ b/lib/verify.h @@ -246,13 +246,6 @@ template <int w> /* @assert.h omit start@ */ -#if defined __has_builtin -/* <https://clang.llvm.org/docs/LanguageExtensions.html#builtin-functions> */ -# define _GL_HAS_BUILTIN_ASSUME __has_builtin (__builtin_assume) -#else -# define _GL_HAS_BUILTIN_ASSUME 0 -#endif - #if 3 < __GNUC__ + (3 < __GNUC_MINOR__ + (4 <= __GNUC_PATCHLEVEL__)) # define _GL_HAS_BUILTIN_TRAP 1 #elif defined __has_builtin @@ -312,36 +305,14 @@ template <int w> Although assuming R can help a compiler generate better code or diagnostics, performance can suffer if R uses hard-to-optimize - features such as function calls not inlined by the compiler. */ - -/* Use __builtin_assume in preference to __builtin_unreachable, because - in clang versions 8.0.x and older, the definition based on - __builtin_assume has an effect on optimizations, whereas the definition - based on __builtin_unreachable does not. (GCC so far has only - __builtin_unreachable.) */ -#if _GL_HAS_BUILTIN_ASSUME -/* Use __builtin_constant_p to help clang's data-flow analysis for the case - assume (0). - Use a temporary variable, to avoid a clang warning - "the argument to '__builtin_assume' has side effects that will be discarded" - if R contains invocations of functions not marked as 'const'. - The type of the temporary variable can't be __typeof__ (R), because that - does not work on bit field expressions. Use '_Bool' or 'bool' as type - instead. */ -# if defined __cplusplus -# define assume(R) \ - (__builtin_constant_p (R) && !(R) \ - ? (void) __builtin_unreachable () \ - : (void) ({ bool _gl_verify_temp = (R); \ - __builtin_assume (_gl_verify_temp); })) -# else -# define assume(R) \ - (__builtin_constant_p (R) && !(R) \ - ? (void) __builtin_unreachable () \ - : (void) ({ _Bool _gl_verify_temp = (R); \ - __builtin_assume (_gl_verify_temp); })) -# endif -#elif _GL_HAS_BUILTIN_UNREACHABLE + features such as function calls not inlined by the compiler. + + Avoid Clang's __builtin_assume, as it breaks GNU Emacs master + as of 2020-08-23T21:09:49Z!eggert@cs.ucla.edu; see + <https://bugs.gnu.org/43152#71>. It's not known whether this breakage + is a Clang bug or an Emacs bug; play it safe for now. */ + +#if _GL_HAS_BUILTIN_UNREACHABLE # define assume(R) ((R) ? (void) 0 : __builtin_unreachable ()) #elif 1200 <= _MSC_VER # define assume(R) __assume (R) diff --git a/m4/include_next.m4 b/m4/include_next.m4 index 33601aa3b43..9221d9f7d5f 100644 --- a/m4/include_next.m4 +++ b/m4/include_next.m4 @@ -1,4 +1,4 @@ -# include_next.m4 serial 25 +# include_next.m4 serial 26 dnl Copyright (C) 2006-2020 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, @@ -106,19 +106,21 @@ dnl We intentionally avoid using AC_LANG_SOURCE here. AC_SUBST([INCLUDE_NEXT]) AC_SUBST([INCLUDE_NEXT_AS_FIRST_DIRECTIVE]) AC_SUBST([PRAGMA_SYSTEM_HEADER]) - AC_CACHE_CHECK([whether system header files limit the line length], - [gl_cv_pragma_columns], - [dnl HP NonStop systems, which define __TANDEM, have this misfeature. - AC_EGREP_CPP([choke me], + + dnl HP NonStop systems, which define __TANDEM, limit the line length + dnl after including some system header files. + AC_CACHE_CHECK([whether source code line length is unlimited], + [gl_cv_source_line_length_unlimited], + [AC_EGREP_CPP([choke me], [ #ifdef __TANDEM choke me #endif ], - [gl_cv_pragma_columns=yes], - [gl_cv_pragma_columns=no]) + [gl_cv_source_line_length_unlimited=no], + [gl_cv_source_line_length_unlimited=yes]) ]) - if test $gl_cv_pragma_columns = yes; then + if test $gl_cv_source_line_length_unlimited = no; then PRAGMA_COLUMNS="#pragma COLUMNS 10000" else PRAGMA_COLUMNS= diff --git a/m4/stdint.m4 b/m4/stdint.m4 index e0fa8a51fb3..d5f5d6133a9 100644 --- a/m4/stdint.m4 +++ b/m4/stdint.m4 @@ -1,4 +1,4 @@ -# stdint.m4 serial 55 +# stdint.m4 serial 56 dnl Copyright (C) 2001-2020 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, @@ -302,9 +302,10 @@ static const char *macro_values[] = HAVE_C99_STDINT_H=1 dnl Now see whether the system <stdint.h> works without dnl __STDC_CONSTANT_MACROS/__STDC_LIMIT_MACROS defined. - AC_CACHE_CHECK([whether stdint.h predates C++11], - [gl_cv_header_stdint_predates_cxx11_h], - [gl_cv_header_stdint_predates_cxx11_h=yes + dnl If not, there would be problems when stdint.h is included from C++. + AC_CACHE_CHECK([whether stdint.h works without ISO C predefines], + [gl_cv_header_stdint_without_STDC_macros], + [gl_cv_header_stdint_without_STDC_macros=no AC_COMPILE_IFELSE([ AC_LANG_PROGRAM([[ #define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1 /* work if build isn't clean */ @@ -315,13 +316,14 @@ gl_STDINT_INCLUDES intmax_t im = INTMAX_MAX; int32_t i32 = INT32_C (0x7fffffff); ]])], - [gl_cv_header_stdint_predates_cxx11_h=no])]) + [gl_cv_header_stdint_without_STDC_macros=yes]) + ]) - if test "$gl_cv_header_stdint_predates_cxx11_h" = yes; then + if test $gl_cv_header_stdint_without_STDC_macros = no; then AC_DEFINE([__STDC_CONSTANT_MACROS], [1], - [Define to 1 if the system <stdint.h> predates C++11.]) + [Define to 1 if the system <stdint.h> predates C++11.]) AC_DEFINE([__STDC_LIMIT_MACROS], [1], - [Define to 1 if the system <stdint.h> predates C++11.]) + [Define to 1 if the system <stdint.h> predates C++11.]) fi AC_CACHE_CHECK([whether stdint.h has UINTMAX_WIDTH etc.], [gl_cv_header_stdint_width], diff --git a/m4/string_h.m4 b/m4/string_h.m4 index d7c12aaae87..29796b8629f 100644 --- a/m4/string_h.m4 +++ b/m4/string_h.m4 @@ -5,7 +5,7 @@ # gives unlimited permission to copy and/or distribute it, # with or without modifications, as long as this notice is preserved. -# serial 26 +# serial 27 # Written by Paul Eggert. @@ -28,7 +28,7 @@ AC_DEFUN([gl_HEADER_STRING_H_BODY], ]], [ffsl ffsll memmem mempcpy memrchr rawmemchr stpcpy stpncpy strchrnul strdup strncat strndup strnlen strpbrk strsep strcasestr strtok_r - strerror_r sigabbrev_np sigdescr_np strsignal strverscmp]) + strerror_r strerrorname_np sigabbrev_np sigdescr_np strsignal strverscmp]) AC_REQUIRE([AC_C_RESTRICT]) ]) @@ -44,47 +44,48 @@ AC_DEFUN([gl_STRING_MODULE_INDICATOR], AC_DEFUN([gl_HEADER_STRING_H_DEFAULTS], [ - GNULIB_EXPLICIT_BZERO=0; AC_SUBST([GNULIB_EXPLICIT_BZERO]) - GNULIB_FFSL=0; AC_SUBST([GNULIB_FFSL]) - GNULIB_FFSLL=0; AC_SUBST([GNULIB_FFSLL]) - GNULIB_MEMCHR=0; AC_SUBST([GNULIB_MEMCHR]) - GNULIB_MEMMEM=0; AC_SUBST([GNULIB_MEMMEM]) - GNULIB_MEMPCPY=0; AC_SUBST([GNULIB_MEMPCPY]) - GNULIB_MEMRCHR=0; AC_SUBST([GNULIB_MEMRCHR]) - GNULIB_RAWMEMCHR=0; AC_SUBST([GNULIB_RAWMEMCHR]) - GNULIB_STPCPY=0; AC_SUBST([GNULIB_STPCPY]) - GNULIB_STPNCPY=0; AC_SUBST([GNULIB_STPNCPY]) - GNULIB_STRCHRNUL=0; AC_SUBST([GNULIB_STRCHRNUL]) - GNULIB_STRDUP=0; AC_SUBST([GNULIB_STRDUP]) - GNULIB_STRNCAT=0; AC_SUBST([GNULIB_STRNCAT]) - GNULIB_STRNDUP=0; AC_SUBST([GNULIB_STRNDUP]) - GNULIB_STRNLEN=0; AC_SUBST([GNULIB_STRNLEN]) - GNULIB_STRPBRK=0; AC_SUBST([GNULIB_STRPBRK]) - GNULIB_STRSEP=0; AC_SUBST([GNULIB_STRSEP]) - GNULIB_STRSTR=0; AC_SUBST([GNULIB_STRSTR]) - GNULIB_STRCASESTR=0; AC_SUBST([GNULIB_STRCASESTR]) - GNULIB_STRTOK_R=0; AC_SUBST([GNULIB_STRTOK_R]) - GNULIB_MBSLEN=0; AC_SUBST([GNULIB_MBSLEN]) - GNULIB_MBSNLEN=0; AC_SUBST([GNULIB_MBSNLEN]) - GNULIB_MBSCHR=0; AC_SUBST([GNULIB_MBSCHR]) - GNULIB_MBSRCHR=0; AC_SUBST([GNULIB_MBSRCHR]) - GNULIB_MBSSTR=0; AC_SUBST([GNULIB_MBSSTR]) - GNULIB_MBSCASECMP=0; AC_SUBST([GNULIB_MBSCASECMP]) - GNULIB_MBSNCASECMP=0; AC_SUBST([GNULIB_MBSNCASECMP]) - GNULIB_MBSPCASECMP=0; AC_SUBST([GNULIB_MBSPCASECMP]) - GNULIB_MBSCASESTR=0; AC_SUBST([GNULIB_MBSCASESTR]) - GNULIB_MBSCSPN=0; AC_SUBST([GNULIB_MBSCSPN]) - GNULIB_MBSPBRK=0; AC_SUBST([GNULIB_MBSPBRK]) - GNULIB_MBSSPN=0; AC_SUBST([GNULIB_MBSSPN]) - GNULIB_MBSSEP=0; AC_SUBST([GNULIB_MBSSEP]) - GNULIB_MBSTOK_R=0; AC_SUBST([GNULIB_MBSTOK_R]) - GNULIB_STRERROR=0; AC_SUBST([GNULIB_STRERROR]) - GNULIB_STRERROR_R=0; AC_SUBST([GNULIB_STRERROR_R]) - GNULIB_SIGABBREV_NP=0;AC_SUBST([GNULIB_SIGABBREV_NP]) - GNULIB_SIGDESCR_NP=0; AC_SUBST([GNULIB_SIGDESCR_NP]) - GNULIB_STRSIGNAL=0; AC_SUBST([GNULIB_STRSIGNAL]) - GNULIB_STRVERSCMP=0; AC_SUBST([GNULIB_STRVERSCMP]) - HAVE_MBSLEN=0; AC_SUBST([HAVE_MBSLEN]) + GNULIB_EXPLICIT_BZERO=0; AC_SUBST([GNULIB_EXPLICIT_BZERO]) + GNULIB_FFSL=0; AC_SUBST([GNULIB_FFSL]) + GNULIB_FFSLL=0; AC_SUBST([GNULIB_FFSLL]) + GNULIB_MEMCHR=0; AC_SUBST([GNULIB_MEMCHR]) + GNULIB_MEMMEM=0; AC_SUBST([GNULIB_MEMMEM]) + GNULIB_MEMPCPY=0; AC_SUBST([GNULIB_MEMPCPY]) + GNULIB_MEMRCHR=0; AC_SUBST([GNULIB_MEMRCHR]) + GNULIB_RAWMEMCHR=0; AC_SUBST([GNULIB_RAWMEMCHR]) + GNULIB_STPCPY=0; AC_SUBST([GNULIB_STPCPY]) + GNULIB_STPNCPY=0; AC_SUBST([GNULIB_STPNCPY]) + GNULIB_STRCHRNUL=0; AC_SUBST([GNULIB_STRCHRNUL]) + GNULIB_STRDUP=0; AC_SUBST([GNULIB_STRDUP]) + GNULIB_STRNCAT=0; AC_SUBST([GNULIB_STRNCAT]) + GNULIB_STRNDUP=0; AC_SUBST([GNULIB_STRNDUP]) + GNULIB_STRNLEN=0; AC_SUBST([GNULIB_STRNLEN]) + GNULIB_STRPBRK=0; AC_SUBST([GNULIB_STRPBRK]) + GNULIB_STRSEP=0; AC_SUBST([GNULIB_STRSEP]) + GNULIB_STRSTR=0; AC_SUBST([GNULIB_STRSTR]) + GNULIB_STRCASESTR=0; AC_SUBST([GNULIB_STRCASESTR]) + GNULIB_STRTOK_R=0; AC_SUBST([GNULIB_STRTOK_R]) + GNULIB_MBSLEN=0; AC_SUBST([GNULIB_MBSLEN]) + GNULIB_MBSNLEN=0; AC_SUBST([GNULIB_MBSNLEN]) + GNULIB_MBSCHR=0; AC_SUBST([GNULIB_MBSCHR]) + GNULIB_MBSRCHR=0; AC_SUBST([GNULIB_MBSRCHR]) + GNULIB_MBSSTR=0; AC_SUBST([GNULIB_MBSSTR]) + GNULIB_MBSCASECMP=0; AC_SUBST([GNULIB_MBSCASECMP]) + GNULIB_MBSNCASECMP=0; AC_SUBST([GNULIB_MBSNCASECMP]) + GNULIB_MBSPCASECMP=0; AC_SUBST([GNULIB_MBSPCASECMP]) + GNULIB_MBSCASESTR=0; AC_SUBST([GNULIB_MBSCASESTR]) + GNULIB_MBSCSPN=0; AC_SUBST([GNULIB_MBSCSPN]) + GNULIB_MBSPBRK=0; AC_SUBST([GNULIB_MBSPBRK]) + GNULIB_MBSSPN=0; AC_SUBST([GNULIB_MBSSPN]) + GNULIB_MBSSEP=0; AC_SUBST([GNULIB_MBSSEP]) + GNULIB_MBSTOK_R=0; AC_SUBST([GNULIB_MBSTOK_R]) + GNULIB_STRERROR=0; AC_SUBST([GNULIB_STRERROR]) + GNULIB_STRERROR_R=0; AC_SUBST([GNULIB_STRERROR_R]) + GNULIB_STRERRORNAME_NP=0; AC_SUBST([GNULIB_STRERRORNAME_NP]) + GNULIB_SIGABBREV_NP=0; AC_SUBST([GNULIB_SIGABBREV_NP]) + GNULIB_SIGDESCR_NP=0; AC_SUBST([GNULIB_SIGDESCR_NP]) + GNULIB_STRSIGNAL=0; AC_SUBST([GNULIB_STRSIGNAL]) + GNULIB_STRVERSCMP=0; AC_SUBST([GNULIB_STRVERSCMP]) + HAVE_MBSLEN=0; AC_SUBST([HAVE_MBSLEN]) dnl Assume proper GNU behavior unless another module says otherwise. HAVE_EXPLICIT_BZERO=1; AC_SUBST([HAVE_EXPLICIT_BZERO]) HAVE_FFSL=1; AC_SUBST([HAVE_FFSL]) @@ -104,6 +105,7 @@ AC_DEFUN([gl_HEADER_STRING_H_DEFAULTS], HAVE_STRCASESTR=1; AC_SUBST([HAVE_STRCASESTR]) HAVE_DECL_STRTOK_R=1; AC_SUBST([HAVE_DECL_STRTOK_R]) HAVE_DECL_STRERROR_R=1; AC_SUBST([HAVE_DECL_STRERROR_R]) + HAVE_STRERRORNAME_NP=1; AC_SUBST([HAVE_STRERRORNAME_NP]) HAVE_SIGABBREV_NP=1; AC_SUBST([HAVE_SIGABBREV_NP]) HAVE_SIGDESCR_NP=1; AC_SUBST([HAVE_SIGDESCR_NP]) HAVE_DECL_STRSIGNAL=1; AC_SUBST([HAVE_DECL_STRSIGNAL]) @@ -121,6 +123,7 @@ AC_DEFUN([gl_HEADER_STRING_H_DEFAULTS], REPLACE_STRTOK_R=0; AC_SUBST([REPLACE_STRTOK_R]) REPLACE_STRERROR=0; AC_SUBST([REPLACE_STRERROR]) REPLACE_STRERROR_R=0; AC_SUBST([REPLACE_STRERROR_R]) + REPLACE_STRERRORNAME_NP=0; AC_SUBST([REPLACE_STRERRORNAME_NP]) REPLACE_STRSIGNAL=0; AC_SUBST([REPLACE_STRSIGNAL]) UNDEFINE_STRTOK_R=0; AC_SUBST([UNDEFINE_STRTOK_R]) ]) diff --git a/m4/time_rz.m4 b/m4/time_rz.m4 index 2dd64b28488..30161c01e63 100644 --- a/m4/time_rz.m4 +++ b/m4/time_rz.m4 @@ -13,12 +13,12 @@ AC_DEFUN([gl_TIME_RZ], AC_REQUIRE([gl_HEADER_TIME_H_DEFAULTS]) AC_REQUIRE([AC_STRUCT_TIMEZONE]) - # Mac OS X 10.6 loops forever with some time_t values. + # On Mac OS X 10.6, localtime loops forever with some time_t values. # See Bug#27706, Bug#27736, and # https://lists.gnu.org/r/bug-gnulib/2017-07/msg00142.html - AC_CACHE_CHECK([whether localtime loops forever near extrema], - [gl_cv_func_localtime_infloop_bug], - [gl_cv_func_localtime_infloop_bug=no + AC_CACHE_CHECK([whether localtime works even near extrema], + [gl_cv_func_localtime_works], + [gl_cv_func_localtime_works=yes AC_RUN_IFELSE( [AC_LANG_PROGRAM( [[#include <stdlib.h> @@ -37,10 +37,10 @@ AC_DEFUN([gl_TIME_RZ], return tm && tm->tm_isdst; ]])], [(TZ=QQQ0 ./conftest$EXEEXT) >/dev/null 2>&1 || - gl_cv_func_localtime_infloop_bug=yes], + gl_cv_func_localtime_works=no], [], - [gl_cv_func_localtime_infloop_bug="guessing no"])]) - if test "$gl_cv_func_localtime_infloop_bug" = yes; then + [gl_cv_func_localtime_works="guessing yes"])]) + if test "$gl_cv_func_localtime_works" = no; then AC_DEFINE([HAVE_LOCALTIME_INFLOOP_BUG], 1, [Define if localtime-like functions can loop forever on extreme arguments.]) |