From: Nick Alcock
My previous nm patch handled all cases but one -- if the user set NM in
the environment to a path which contained an option, libtool's nm
detection tries to run nm against a copy of nm with the options in it:
e.g. if NM was set to "nm --blargle", and nm was found in /usr/bin, the
test would try to run "/usr/bin/nm --blargle /usr/bin/nm --blargle".
This is unlikely to be desirable: in this case we should run
"/usr/bin/nm --blargle /usr/bin/nm".
Furthermore, as part of this nm has to detect when the passed-in $NM
contains a path, and in that case avoid doing a path search itself.
This too was thrown off if an option contained something that looked
like a path, e.g. NM="nm -B../prev-gcc"; libtool then tries to run
"nm -B../prev-gcc nm" which rarely works well (and indeed it looks
to see whether that nm exists, finds it doesn't, and wrongly concludes
that nm -p or whatever does not work).
Fix all of these by clipping all options (defined as everything
including and after the first " -") before deciding whether nm
contains a path (but not using the clipped value for anything else),
and then removing all options from the path-modified nm before
looking to see whether that nm existed.
NM=my-nm now does a path search and runs e.g.
/usr/bin/my-nm -B /usr/bin/my-nm
NM=/usr/bin/my-nm now avoids a path search and runs e.g.
/usr/bin/my-nm -B /usr/bin/my-nm
NM="my-nm -p../wombat" now does a path search and runs e.g.
/usr/bin/my-nm -p../wombat -B /usr/bin/my-nm
NM="../prev-binutils/new-nm -B../prev-gcc" now avoids a path search:
../prev-binutils/my-nm -B../prev-gcc -B ../prev-binutils/my-nm
This seems to be all combinations, including those used by GCC bootstrap
(which, before this commit, fails to bootstrap when configured
--with-build-config=bootstrap-lto, because the lto plugin is now using
--export-symbols-regex, which requires libtool to find a working nm,
while also using -B../prev-gcc to point at the lto plugin associated
with the GCC just built.)
Regenerate all affected configure scripts.
ChangeLog:
* libtool.m4 (LT_PATH_NM): Handle user-specified NM with
options, including options containing paths.
gcc/ChangeLog:
* configure: Regenerate.
libatomic/ChangeLog:
* configure: Regenerate.
libbacktrace/ChangeLog:
* configure: Regenerate.
libcc1/ChangeLog:
* configure: Regenerate.
libffi/ChangeLog:
* configure: Regenerate.
libgfortran/ChangeLog:
* configure: Regenerate.
libgm2/ChangeLog:
* configure: Regenerate.
libgomp/ChangeLog:
* configure: Regenerate.
libitm/ChangeLog:
* configure: Regenerate.
libobjc/ChangeLog:
* configure: Regenerate.
libphobos/ChangeLog:
* configure: Regenerate.
libquadmath/ChangeLog:
* configure: Regenerate.
libsanitizer/ChangeLog:
* configure: Regenerate.
libssp/ChangeLog:
* configure: Regenerate.
libstdc++-v3/ChangeLog:
* configure: Regenerate.
libvtv/ChangeLog:
* configure: Regenerate.
lto-plugin/ChangeLog:
* configure: Regenerate.
zlib/ChangeLog:
* configure: Regenerate.
---
gcc/configure | 20 +---
libatomic/configure| 20 +---
libbacktrace/configure | 20 +---
libcc1/configure | 20 +---
libffi/configure | 20 +---
libgfortran/configure | 20 +---
libgm2/configure | 20 +---
libgomp/configure | 20 +---
libitm/configure | 20 +---
libobjc/configure | 20 +---
libphobos/configure| 20 +---
libquadmath/configure | 20 +---
libsanitizer/configure | 20 +---
libssp/configure | 20 +---
libstdc++-v3/configure | 32 +++-
libtool.m4 | 16 +++-
libvtv/configure | 20 +---
lto-plugin/configure | 20 +---
zlib/configure | 20 +---
19 files changed, 251 insertions(+), 137 deletions(-)
diff --git a/gcc/configure b/gcc/configure
index 81b93c1b599..c58a99f5d40 100755
--- a/gcc/configure
+++ b/gcc/configure
@@ -14144,25 +14144,31 @@ else
lt_nm_to_check="$lt_nm_to_check nm"
fi
fi
- for lt_tmp_nm in $lt_nm_to_check; do
+ for lt_tmp_nm in "$lt_nm_to_check"; do
lt_save_ifs="$IFS"; IFS=$PATH_SEPARATOR
for ac_dir in $PATH /usr/ccs/bin/elf /usr/ccs/bin /usr/ucb /bin; do
IFS="$lt_save_ifs"
test -z "$ac_dir" && ac_dir=.
- case "$lt_tmp_nm" in
+ # Strip out any user-provided options from the nm to test twice,
+ # the first time to test to see if nm (rather than its options) has
+ # an explicit path, the second time to yield a file which can be
+ # nm'ed itself.
+ tmp_nm_path="`$ECHO "$lt_tmp_nm" | sed 's, -.*$,,'`"
+ case
