diff options
Diffstat (limited to 'config/c-compiler.m4')
| -rw-r--r-- | config/c-compiler.m4 | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/config/c-compiler.m4 b/config/c-compiler.m4 index 9731a517dee..dfcc1c66006 100644 --- a/config/c-compiler.m4 +++ b/config/c-compiler.m4 @@ -19,12 +19,12 @@ fi])# PGAC_C_SIGNED # PGAC_C_PRINTF_ARCHETYPE # ----------------------- -# Set the format archetype used by gcc to check printf type functions. We -# prefer "gnu_printf", which includes what glibc uses, such as %m for error -# strings and %lld for 64 bit long longs. GCC 4.4 introduced it. It makes a -# dramatic difference on Windows. +# Set the format archetype used by gcc to check elog/ereport functions. +# This should accept %m, whether or not the platform's printf does. +# We use "gnu_printf" if possible, which does that, although in some cases +# it might do more than we could wish. AC_DEFUN([PGAC_PRINTF_ARCHETYPE], -[AC_CACHE_CHECK([for printf format archetype], pgac_cv_printf_archetype, +[AC_CACHE_CHECK([for printf format archetype for %m], pgac_cv_printf_archetype, [ac_save_c_werror_flag=$ac_c_werror_flag ac_c_werror_flag=yes AC_COMPILE_IFELSE([AC_LANG_PROGRAM( @@ -34,8 +34,8 @@ __attribute__((format(gnu_printf, 2, 3)));], [])], [pgac_cv_printf_archetype=gnu_printf], [pgac_cv_printf_archetype=printf]) ac_c_werror_flag=$ac_save_c_werror_flag]) -AC_DEFINE_UNQUOTED([PG_PRINTF_ATTRIBUTE], [$pgac_cv_printf_archetype], - [Define to gnu_printf if compiler supports it, else printf.]) +AC_DEFINE_UNQUOTED([PG_PRINTF_ATTRIBUTE_M], [$pgac_cv_printf_archetype], + [Define as a format archetype that accepts %m, if available, else printf.]) ])# PGAC_PRINTF_ARCHETYPE |