buildroot

From 5dcb7cd3cb63bf8a3a5f7531d10f937053930a25 Mon Sep 17 00:00:00 2001

From: Tony Kelman <tony@kelman.net>

Date: Sun, 31 Jan 2016 08:31:04 +0000

Subject: [PATCH] Fix compilation of tests on alpine linux (musl libc)

​

If we don't link to libexecinfo, as detected by the

AC_SEARCH_LIBS(backtrace, execinfo) configure probe, we get

​

```

test-coredump-unwind.o: In function `handle_sigsegv':

/home/libunwind/tests/test-coredump-unwind.c:246: undefined reference to

`backtrace_symbols_fd'

collect2: error: ld returned 1 exit status

Makefile:1187: recipe for target 'test-coredump-unwind' failed

```

​

and

​

```

Gtest-init.o: In function `do_backtrace()':

Gtest-init.cxx:(.text+0x2f): undefined reference to `_Ux86_64_getcontext'

Gtest-init.cxx:(.text+0x48): undefined reference to `_Ux86_64_init_local'

Gtest-init.cxx:(.text+0x63): undefined reference to `_Ux86_64_get_reg'

Gtest-init.cxx:(.text+0x96): undefined reference to `_Ux86_64_get_proc_name'

Gtest-init.cxx:(.text+0x171): undefined reference to `_Ux86_64_step'

collect2: error: ld returned 1 exit status

Makefile:1063: recipe for target 'Gtest-init' failed

```

​

There are 2 XFAIL and 6 FAIL tests, but it's a start

​

Backported from upstream master branch:

https://github.com/libunwind/libunwind/commit/5dcb7cd3cb63bf8a3a5f7531d10f937053930a25

​

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>

---

 configure.ac      | 5 +++++

 tests/Makefile.am | 4 ++--

 2 files changed, 7 insertions(+), 2 deletions(-)

​

diff --git a/configure.ac b/configure.ac

index 6c46cf3..21bae90 100644

--- a/configure.ac

+++ b/configure.ac

@@ -373,6 +373,10 @@ old_LIBS="$LIBS"

 LIBS=""

 AC_SEARCH_LIBS(backtrace, execinfo)

 LIBS="$old_LIBS"

+case "$ac_cv_search_backtrace" in

+  -l*) BACKTRACELIB=$ac_cv_search_backtrace;;

+  *) BACKTRACELIB="";;

+esac

 AC_SUBST(build_arch)

 AC_SUBST(target_os)

@@ -388,6 +392,7 @@ AC_SUBST(PKG_MAINTAINER)

 AC_SUBST(enable_cxx_exceptions)

 AC_SUBST(enable_debug_frame)

 AC_SUBST(DLLIB)

+AC_SUBST(BACKTRACELIB)

 AC_PATH_PROG([LATEX2MAN],[latex2man])

 if test "x$LATEX2MAN" = "x"; then