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Fix AC_REQUIRES breakage in LLVM autoconf tests.

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Any Autoconf macro that uses AC_REQUIRES -- directly or indirectly --
must not be inside a plain shell "if" test; if it is, whatever code
gets pulled in by the AC_REQUIRES will also be inside that "if".
Instead of "if" we can use AS_IF, which knows how to get this right
(cf commit 01051a987).

The only immediate problem from getting this wrong was that AC_PROG_AWK
had to be run twice, once inside the "if llvm" block and once in the
main line.  However, it broke a different patch I'm about to submit
more thoroughly.
This commit is contained in:
Tom Lane 2018-11-17 23:16:00 -05:00
parent d3bbc4b96a
commit 0b59b0e8bc
2 changed files with 4 additions and 48 deletions
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44
configure vendored
View File

@ -4948,7 +4948,6 @@ fi
if test "$with_llvm" = yes ; then
for ac_prog in gawk mawk nawk awk
do
# Extract the first word of "$ac_prog", so it can be a program name with args.
@ -4991,6 +4990,7 @@ fi
test -n "$AWK" && break
done
if test "$with_llvm" = yes; then :
@ -9400,48 +9400,6 @@ else
$as_echo "no, using $LN_S" >&6; }
fi
for ac_prog in gawk mawk nawk awk
do
# Extract the first word of "$ac_prog", so it can be a program name with args.
set dummy $ac_prog; ac_word=$2
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
$as_echo_n "checking for $ac_word... " >&6; }
if ${ac_cv_prog_AWK+:} false; then :
$as_echo_n "(cached) " >&6
else
if test -n "$AWK"; then
ac_cv_prog_AWK="$AWK" # Let the user override the test.
else
as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
for as_dir in $PATH
do
IFS=$as_save_IFS
test -z "$as_dir" && as_dir=.
for ac_exec_ext in '' $ac_executable_extensions; do
if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
ac_cv_prog_AWK="$ac_prog"
$as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
break 2
fi
done
done
IFS=$as_save_IFS
fi
fi
AWK=$ac_cv_prog_AWK
if test -n "$AWK"; then
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $AWK" >&5
$as_echo "$AWK" >&6; }
else
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
$as_echo "no" >&6; }
fi
test -n "$AWK" && break
done
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for a thread-safe mkdir -p" >&5
$as_echo_n "checking for a thread-safe mkdir -p... " >&6; }
if test -z "$MKDIR_P"; then

6
configure.in
View File

@ -391,9 +391,8 @@ AC_SUBST(SUN_STUDIO_CC)
PGAC_ARG_BOOL(with, llvm, no, [build with LLVM based JIT support],
[AC_DEFINE([USE_LLVM], 1, [Define to 1 to build with LLVM based JIT support. (--with-llvm)])])
AC_SUBST(with_llvm)
if test "$with_llvm" = yes ; then
PGAC_LLVM_SUPPORT()
fi
dnl must use AS_IF here, else AC_REQUIRES inside PGAC_LLVM_SUPPORT malfunctions
AS_IF([test "$with_llvm" = yes], [PGAC_LLVM_SUPPORT()])
unset CFLAGS
@ -1020,7 +1019,6 @@ AC_SUBST(install_bin)
PGAC_PATH_PROGS(TAR, tar)
AC_PROG_LN_S
AC_PROG_AWK
AC_PROG_MKDIR_P
# When Autoconf chooses install-sh as mkdir -p program it tries to generate
# a relative path to it in each makefile where it substitutes it. This clashes