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configure: Invocations of RB_CHK_SYSHEADER are no-op after first success.

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This commit is contained in:
Jason Volk 2019-02-18 15:44:59 -08:00
parent e8f8008ea9
commit 2935d35f7d
1 changed files with 10 additions and 7 deletions
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17
configure.ac
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@ -616,13 +616,16 @@ dnl
AC_DEFUN([RB_CHK_SYSHEADER],
[
AC_CHECK_HEADER([$1],
[
AC_DEFINE([HAVE_$2], [1], [ Indication $1 is available. ])
RB_DEFINE_UNQUOTED([INC_$2], [$1>], [ The computed-include location of $1. ])
], [
RB_DEFINE_UNQUOTED([INC_$2], [stddef.h>], [ The dead-header in place of $1. ])
])
if test -z "$rb_have_sysheader_$2"; then
AC_CHECK_HEADER([$1],
[
rb_have_sysheader_$2=1;
AC_DEFINE([HAVE_$2], [1], [ Indication $1 is available. ])
RB_DEFINE_UNQUOTED([INC_$2], [$1>], [ The computed-include location of $1. ])
], [
RB_DEFINE_UNQUOTED([INC_$2], [stddef.h>], [ The dead-header in place of $1. ])
])
fi
])
AC_HEADER_STDBOOL