[Buildroot] [git commit] package/libcpprestsdk: link with libatomic when needed

[Thomas Petazzoni]

commit: https://git.buildroot.net/buildroot/commit/?id=cd70bde797a3580b27566b302d601ddd7459e910
branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/master

On some architectures, atomic binutils are provided by the libatomic
library from gcc. Linking with libatomic is therefore necessary,
otherwise the build fails with:

sparc-buildroot-linux-uclibc/sysroot/lib/libatomic.so.1: error adding symbols: DSO missing from command line

This is often for example the case on sparcv8 32 bit.

Fixes:
 - http://autobuild.buildroot.org/results/983537ceb38add50ca0a2316f39a2964db1b83c5

Signed-off-by: Fabrice Fontaine <fontaine.fabrice at gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni at bootlin.com>
---
 package/libcpprestsdk/libcpprestsdk.mk | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/package/libcpprestsdk/libcpprestsdk.mk b/package/libcpprestsdk/libcpprestsdk.mk
index 74c8eec46f..a03e6d250b 100644
--- a/package/libcpprestsdk/libcpprestsdk.mk
+++ b/package/libcpprestsdk/libcpprestsdk.mk
@@ -12,4 +12,8 @@ LIBCPPRESTSDK_SUBDIR = Release
 LIBCPPRESTSDK_DEPENDENCIES += host-pkgconf boost openssl zlib
 LIBCPPRESTSDK_CONF_OPTS = -DWERROR=OFF -DCPPREST_EXCLUDE_WEBSOCKETS=ON -DBUILD_SAMPLES=OFF
 
+ifeq ($(BR2_TOOLCHAIN_HAS_LIBATOMIC),y)
+LIBCPPRESTSDK_CONF_OPTS += -DCMAKE_CXX_FLAGS="$(TARGET_CXXFLAGS) -latomic"
+endif
+
 $(eval $(cmake-package))