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caf606c90d
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. * libtool.m4 (LT_PATH_NM): Handle user-specified NM with options, including options containing paths. |
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| .. | ||
| aclocal.m4 | ||
| alloc.c | ||
| allocfail.c | ||
| allocfail.sh | ||
| atomic.c | ||
| backtrace-supported.h.in | ||
| backtrace.c | ||
| backtrace.h | ||
| btest.c | ||
| ChangeLog | ||
| ChangeLog.jit | ||
| config.h.in | ||
| configure | ||
| configure.ac | ||
| dwarf.c | ||
| edtest2.c | ||
| edtest.c | ||
| elf.c | ||
| fileline.c | ||
| filetype.awk | ||
| install-debuginfo-for-buildid.sh.in | ||
| instrumented_alloc.c | ||
| internal.h | ||
| macho.c | ||
| Makefile.am | ||
| Makefile.in | ||
| mmap.c | ||
| mmapio.c | ||
| mtest.c | ||
| nounwind.c | ||
| pecoff.c | ||
| posix.c | ||
| print.c | ||
| read.c | ||
| README | ||
| simple.c | ||
| sort.c | ||
| state.c | ||
| stest.c | ||
| test_format.c | ||
| testlib.c | ||
| testlib.h | ||
| ttest.c | ||
| unittest.c | ||
| unknown.c | ||
| xcoff.c | ||
| xztest.c | ||
| ztest.c | ||
The libbacktrace library Initially written by Ian Lance Taylor <iant@google.com> The libbacktrace library may be linked into a program or library and used to produce symbolic backtraces. Sample uses would be to print a detailed backtrace when an error occurs or to gather detailed profiling information. The libbacktrace library is provided under a BSD license. See the source files for the exact license text. The public functions are declared and documented in the header file backtrace.h, which should be #include'd by a user of the library. Building libbacktrace will generate a file backtrace-supported.h, which a user of the library may use to determine whether backtraces will work. See the source file backtrace-supported.h.in for the macros that it defines. As of September 2012, libbacktrace only supports ELF executables with DWARF debugging information. The library is written to make it straightforward to add support for other object file and debugging formats.