[PATCH] config.mak.uname: set NO_REGEX=NeedsStartEnd on AIX

[Ævar Arnfjörð Bjarmason]

Set the NO_REGEX=NeedsStartEnd Makefile flag by default on AIX.

Since commit 2f8952250a ("regex: add regexec_buf() that can work on a
non NUL-terminated string", 2016-09-21) git has errored out at
compile-time if the regular expression library doesn't support
REG_STARTEND.

While looking through Google search results for the use of NO_REGEX I
found a Chef recipe that set this on AIX[1], looking through the
documentation for the latest version of AIX (7.2, released October
2015) shows that its regexec() doesn't have REG_STARTEND.

1. 
https://github.com/chef/omnibus-software/commit/e247e36761#diff-3df898345d670979b74acc0bf71d8c47
2. 
https://www.ibm.com/support/knowledgecenter/ssw_aix_72/com.ibm.aix.basetrf2/regexec.htm

Signed-off-by: Ævar Arnfjörð Bjarmason <ava...@gmail.com>
---
 config.mak.uname | 1 +
 1 file changed, 1 insertion(+)

diff --git a/config.mak.uname b/config.mak.uname
index 399fe19271..192629f143 100644
--- a/config.mak.uname
+++ b/config.mak.uname
@@ -237,6 +237,7 @@ ifeq ($(uname_S),AIX)
        NO_MKDTEMP = YesPlease
        NO_STRLCPY = YesPlease
        NO_NSEC = YesPlease
+       NO_REGEX = NeedsStartEnd
        FREAD_READS_DIRECTORIES = UnfortunatelyYes
        INTERNAL_QSORT = UnfortunatelyYes
        NEEDS_LIBICONV = YesPlease
-- 
2.11.0