[Buildroot] [PATCH 1/1] package/boinc: fix build with libexecinfo

[Fabrice Fontaine]

Fix the following build failure raised on uclibc and musl since the
addition of libexecinfo package in commit
eea8ba446c10701a273432552108d80fb2224ef4:

/home/buildroot/autobuild/instance-0/output-1/host/opt/ext-toolchain/bin/../lib/gcc/arc-buildroot-linux-uclibc/10.2.0/../../../../arc-buildroot-linux-uclibc/bin/ld: ../lib/.libs/libboinc.a(libboinc_la-diagnostics.o): in function `boinc_catch_signal':
diagnostics.cpp:(.text+0x8a): undefined reference to `backtrace'

Fixes:
 - http://autobuild.buildroot.org/results/4504379b464eb144a4c257001eb4d316bb1f5e44

Signed-off-by: Fabrice Fontaine <fontaine.fabrice at gmail.com>
---
 package/boinc/boinc.mk | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/package/boinc/boinc.mk b/package/boinc/boinc.mk
index 0d992f136c..695495f777 100644
--- a/package/boinc/boinc.mk
+++ b/package/boinc/boinc.mk
@@ -39,7 +39,12 @@ ifeq ($(BR2_PACKAGE_FREETYPE),y)
 BOINC_DEPENDENCIES += freetype
 endif
 
-BOINC_MAKE_OPTS = CXXFLAGS="$(TARGET_CXXFLAGS) -std=c++11"
+ifeq ($(BR2_PACKAGE_LIBEXECINFO),y)
+BOINC_DEPENDENCIES += libexecinfo
+BOINC_MAKE_OPTS += LIBS="-lexecinfo"
+endif
+
+BOINC_MAKE_OPTS += CXXFLAGS="$(TARGET_CXXFLAGS) -std=c++11"
 
 # Remove boinc-client because it is incompatible with buildroot
 define BOINC_REMOVE_UNNEEDED_FILE
-- 
2.35.1