make configure check for visibility preinclude compatible with pcc
pcc does not search for -include relative to the working directory
unless -I. is used. rather than adding -I., which could be problematic
if there's extra junk in the top-level directory, switch back to the
old method (reverting commit 60ed988fd6c67b489d7cc186ecaa9db4e5c25b8c)
of using -include vis.h and relying on -I./src/internal being present
on the command line (which the Makefile guarantees). to fix the
breakage that was present in trycppif checks with the old method,
$CFLAGS_AUTO is removed from the command line passed to trycppif; this
is valid since $CFLAGS_AUTO should not contain options that alter
compiler semantics or ABI, only optimizations, warnings, etc.
diff --git a/configure b/configure
index f325cda..1b6b464 100755
--- a/configure
+++ b/configure
@@ -431,7 +431,7 @@
echo 'int foo(void) { }' >> "$tmpc"
echo 'int bar(void) { fp = foo; return foo(); }' >> "$tmpc"
if $CC $CFLAGS_C99FSE $CPPFLAGS $CFLAGS \
- -DSHARED -fPIC -include src/internal/vis.h \
+ -DSHARED -fPIC -I./src/internal -include vis.h \
-nostdlib -shared -Wl,-Bsymbolic-functions \
-o /dev/null "$tmpc" >/dev/null 2>&1 ; then
visibility=yes
@@ -442,7 +442,7 @@
fi
if test "x$visibility" == xyes ; then
-CFLAGS_AUTO="$CFLAGS_AUTO -include src/internal/vis.h"
+CFLAGS_AUTO="$CFLAGS_AUTO -include vis.h"
CFLAGS_AUTO="${CFLAGS_AUTO# }"
fi
@@ -468,7 +468,7 @@
# Figure out arch variants for archs with variants
SUBARCH=
-t="$CFLAGS_C99FSE $CPPFLAGS $CFLAGS_AUTO $CFLAGS"
+t="$CFLAGS_C99FSE $CPPFLAGS $CFLAGS"
if test "$ARCH" = "x86_64" ; then
trycppif __ILP32__ "$t" && ARCH=x32