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configure: More use of AC_ARG_VAR

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AC_ARG_VAR is necessary if an environment variable influences a
configure result that is then used by other tests that are cached.
With AC_ARG_VAR, a change in the variable is detected on subsequent
configure runs and the user is then advised to remove the cache.

This adds AC_ARG_VAR calls for: MSGFMT, PERL, PYTHON, TCLSH, XML2_CONFIG

Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://www.postgresql.org/message-id/30672.1546816567@sss.pgh.pa.us
This commit is contained in:
Peter Eisentraut
2019-01-18 08:29:42 +01:00
parent 80971bc206
commit 29b3ac7546
6 changed files with 18 additions and 3 deletions
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1
config/perl.m4
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@ -5,6 +5,7 @@
# --------------
AC_DEFUN([PGAC_PATH_PERL],
[PGAC_PATH_PROGS(PERL, perl)
AC_ARG_VAR(PERL, [Perl program])dnl
if test "$PERL"; then
pgac_perl_version=`$PERL -v 2>/dev/null | sed -n ['s/This is perl.*v[a-z ]*\([0-9]\.[0-9][0-9.]*\).*$/\1/p']`