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| author | Zack Weinberg <zackw@panix.com> | 2022-07-10 12:06:11 -0400 |
|---|---|---|
| committer | Zack Weinberg <zackw@panix.com> | 2022-07-10 15:05:31 -0400 |
| commit | 56b21590f64b85bf69ce6a264975a0f3ef0fb2f9 (patch) | |
| tree | 5445642447a076389d36b58bc62b79e3f0fd0281 /lib | |
| parent | db7205a8647f5c197953a60d1e86a9993e1a9dca (diff) | |
| download | autoconf-56b21590f64b85bf69ce6a264975a0f3ef0fb2f9.tar.gz | |
Fix testsuite failures on Darwin (aka macOS).
Tests of AC_{CHECK_,}HEADER_STDBOOL were failing on Darwin for two
reasons: an m4 quoting bug in tests/local.at causing Darwin sed to
throw syntax errors, and an excessively precise interpretation of how
C99 and C++11 interact. The latter is worth mentioning in NEWS.
* tests/local.at (_AT_DEFINES_CMP_PRUNE): Insert [] before ‘dnl’ in
two places to keep it separate from the result of the m4_bpatsubsts
operation that immediately precedes it.
* lib/autoconf/headers.m4 (AC_CHECK_HEADER_STDBOOL): Allow ‘bool’,
‘true’, and ‘false’ not to be macros, after including stdbool.h,
whenever __cplusplus is defined.
* NEWS: Document change to AC_{CHECK_,}HEADER_STDBOOL.
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/autoconf/headers.m4 | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/lib/autoconf/headers.m4 b/lib/autoconf/headers.m4 index 8944da41..5cd1f4d5 100644 --- a/lib/autoconf/headers.m4 +++ b/lib/autoconf/headers.m4 @@ -633,8 +633,10 @@ AC_DEFUN([AC_CHECK_HEADER_STDBOOL], bool *pp = &p; /* C 1999 specifies that bool, true, and false are to be - macros, but C++ 2011 and later overrule this. */ - #if __cplusplus < 201103 + macros, but C++ 2011 overrules this. The C++ committee + was codifying existing practice, so we allow them to + not be macros whenever __cplusplus is defined. */ + #ifndef __cplusplus #ifndef bool #error "bool is not defined" #endif |