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Fix the cached value of ac_cv_c_compiler_gnu

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There was an error in AX_PROG_CC_FOR_BUILD macro that cached literal
name of the cache variable `saved_ac_cv_c_compiler_gnu` instead of the
value of said variable breaking the consecutive runs of ./configure
script with caching enabled.

(cherry picked from commit 4a9f899b5c)
This commit is contained in:
Ondřej Surý
2022-04-26 15:27:10 +02:00
parent d5fd2a53ef
commit 1bcd20d4bb
1 changed files with 5 additions and 5 deletions
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10
m4/ax_prog_cc_for_build.m4
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@@ -91,16 +91,16 @@ AC_LANG_PUSH([C])
dnl The pushdef([ac_cv_c_compiler_gnu], ...) currently does not cover
dnl the use of this variable in _AC_LANG_COMPILER_GNU called by
dnl AC_PROG_CC. Unset this cache variable temporarily as a workaround.
was_set_ac_cv_c_compiler_gnu=${[ac_cv_c_compiler_gnu]+y}
AS_IF([test ${was_set_ac_cv_c_compiler_gnu}],
[saved_ac_cv_c_compiler_gnu=$[ac_cv_c_compiler_gnu]
was_set_c_compiler_gnu=${[ac_cv_c_compiler_gnu]+y}
AS_IF([test ${was_set_c_compiler_gnu}],
[saved_c_compiler_gnu=$[ac_cv_c_compiler_gnu]
AS_UNSET([[ac_cv_c_compiler_gnu]])])
AC_PROG_CC
dnl Restore ac_cv_c_compiler_gnu
AS_IF([test ${was_set_ac_cv_c_compiler_gnu}],
[[ac_cv_c_compiler_gnu]=saved_ac_cv_c_compiler_gnu])
AS_IF([test ${was_set_c_compiler_gnu}],
[[ac_cv_c_compiler_gnu]=$[saved_c_compiler_gnu]])
_AC_COMPILER_EXEEXT
_AC_COMPILER_OBJEXT