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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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config/tcl.m4
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@ -5,6 +5,7 @@
AC_DEFUN([PGAC_PATH_TCLSH],
[PGAC_PATH_PROGS(TCLSH, [tclsh tcl tclsh8.6 tclsh86 tclsh8.5 tclsh85 tclsh8.4 tclsh84])
AC_ARG_VAR(TCLSH, [Tcl interpreter program (tclsh)])dnl
if test x"$TCLSH" = x""; then
AC_MSG_ERROR([Tcl shell not found])
fi