[Buildroot] [git commit branch/2017.02.x] cppcms: fix build on machines with libgpg-error installed

[Buildroot] [git commit branch/2017.02.x] cppcms: fix build on machines with libgpg-error installed

[Peter Korsgaard]

commit: https://git.buildroot.net/buildroot/commit/?id=5e44457add4d3b48b6c389ea8f84d49da754ec89
branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/2017.02.x

In configuration where target architecture == host architecture, and
libgpg-error is installed system-wide with development files, the build
of cppcms fails with:

/home/test/buildroot/output/host/usr/bin/x86_64-amd-linux-gnu-g++  --sysroot=/home/test/buildroot/output/host/usr/x86_64-buildroot-linux-gnu/sysroot  -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os -Wall -Wextra  -DNDEBUG   CMakeFiles/base64_test.dir/tests/base64_test.cpp.o  -o base64_test  -L/home/test/buildroot/output/host/usr/x86_64-buildroot-linux-gnu/sysroot/usr/lib -Wl,-rpath,/home/test/buildroot/output/build/cppcms-1.0.5:/home/test/buildroot/output/build/cppcms-1.0.5/booster:/usr/lib -rdynamic libcppcms.so.1.0.5 booster/libbooster.so.0.0.3 -lpthread /home/test/buildroot/output/host/usr/x86_64-buildroot-linux-gnu/sysroot/usr/lib/libpcre.so /home/test/buildroot/output/host/usr/x86_64-buildroot-linux-gnu/sysroot/usr/lib/libgcrypt.so /home/test/buildroot/output/host/usr/x86_64-buildroot-linux-gnu/sysroot/usr/lib/libdl.so /home/test/buildroot/output/host/usr/x86_64-buildroot-linux-gnu/sysroot/usr/lib/libz.so
/home/test/buildroot/output/host/usr/x86_64-buildroot-linux-gnu/sysroot/usr/lib/libgcrypt.so: undefined reference to `gpg_err_set_errno at GPG_ERROR_1.0'
/home/test/buildroot/output/host/usr/x86_64-buildroot-linux-gnu/sysroot/usr/lib/libgcrypt.so: undefined reference to `gpgrt_lock_init at GPG_ERROR_1.0'
/home/test/buildroot/output/host/usr/x86_64-buildroot-linux-gnu/sysroot/usr/lib/libgcrypt.so: undefined reference to `gpgrt_lock_destroy at GPG_ERROR_1.0'
/home/test/buildroot/output/host/usr/x86_64-buildroot-linux-gnu/sysroot/usr/lib/libgcrypt.so: undefined reference to `gpg_err_code_from_syserror at GPG_ERROR_1.0'
/home/test/buildroot/output/host/usr/x86_64-buildroot-linux-gnu/sysroot/usr/lib/libgcrypt.so: undefined reference to `gpg_err_code_from_errno at GPG_ERROR_1.0'
/home/test/buildroot/output/host/usr/x86_64-buildroot-linux-gnu/sysroot/usr/lib/libgcrypt.so: undefined reference to `gpgrt_lock_unlock at GPG_ERROR_1.0'
/home/test/buildroot/output/host/usr/x86_64-buildroot-linux-gnu/sysroot/usr/lib/libgcrypt.so: undefined reference to `gpg_strerror at GPG_ERROR_1.0'
/home/test/buildroot/output/host/usr/x86_64-buildroot-linux-gnu/sysroot/usr/lib/libgcrypt.so: undefined reference to `gpg_strsource at GPG_ERROR_1.0'
/home/test/buildroot/output/host/usr/x86_64-buildroot-linux-gnu/sysroot/usr/lib/libgcrypt.so: undefined reference to `gpgrt_lock_lock at GPG_ERROR_1.0'

The problem comes from the
"-Wl,-rpath,/home/test/buildroot/output/build/cppcms-1.0.5:/home/test/buildroot/output/build/cppcms-1.0.5/booster:/usr/lib"
option, which tells the linker to search for libraries in /usr/lib.

This commit fixes that by asking CMake to not add any rpath when
building cppcms.

Fixes:

  http://autobuild.buildroot.net/results/a7eb1ede552ae14f409cfd7bd877bcf25ca69a74/

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Reviewed-by: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit 15423bd46e925b1aed12aac8eddeaf249b4bd999)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
---
 package/cppcms/cppcms.mk | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/package/cppcms/cppcms.mk b/package/cppcms/cppcms.mk
index 611020c..d908d7b 100644
--- a/package/cppcms/cppcms.mk
+++ b/package/cppcms/cppcms.mk
@@ -11,6 +11,10 @@ CPPCMS_LICENSE_FILES = COPYING.TXT
 CPPCMS_SITE = http://downloads.sourceforge.net/project/cppcms/cppcms/$(CPPCMS_VERSION)
 CPPCMS_INSTALL_STAGING = YES
 
+# disable rpath to avoid getting /usr/lib added to the link search
+# path
+CPPCMS_CONF_OPTS = -DCMAKE_SKIP_RPATH=ON
+
 CPPCMS_DEPENDENCIES = zlib pcre libgcrypt
 
 ifeq ($(BR2_PACKAGE_CPPCMS_ICU),y)