[Buildroot] [git commit branch/2022.02.x] package/cairo: fix build with libexecinfo

[Peter Korsgaard]

commit: https://git.buildroot.net/buildroot/commit/?id=7547d4c317ee58ac48f2b785e66db93147df4fa4
branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/2022.02.x

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

/home/giuliobenetti/autobuild/run/instance-2/output-1/host/lib/gcc/arm-buildroot-linux-uclibcgnueabi/10.3.0/../../../../arm-buildroot-linux-uclibcgnueabi/bin/ld: /home/giuliobenetti/autobuild/run/instance-2/output-1/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/lib/libvcos.so: undefined reference to `backtrace_symbols'
/home/giuliobenetti/autobuild/run/instance-2/output-1/host/lib/gcc/arm-buildroot-linux-uclibcgnueabi/10.3.0/../../../../arm-buildroot-linux-uclibcgnueabi/bin/ld: /home/giuliobenetti/autobuild/run/instance-2/output-1/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/lib/libvcos.so: undefined reference to `backtrace'

Fixes:
 - http://autobuild.buildroot.org/results/836348270d564a46cc9ee840cf87b2494cc82cec

Signed-off-by: Fabrice Fontaine <fontaine.fabrice at gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout at mind.be>
(cherry picked from commit c97bc9a2e4ded6964f74a5d835dbeb18ea3f33d3)
Signed-off-by: Peter Korsgaard <peter at korsgaard.com>
---
 package/cairo/cairo.mk | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/package/cairo/cairo.mk b/package/cairo/cairo.mk
index 98f270442a..f479aa252a 100644
--- a/package/cairo/cairo.mk
+++ b/package/cairo/cairo.mk
@@ -15,6 +15,8 @@ CAIRO_INSTALL_STAGING = YES
 # 0002-ft-Use-FT_Done_MM_Var-instead-of-free-when-available-in-cairo_ft_apply_variation.patch
 CAIRO_IGNORE_CVES += CVE-2018-19876
 
+CAIRO_CONF_ENV = LIBS="$(CAIRO_LIBS)"
+
 # relocation truncated to fit: R_68K_GOT16O
 ifeq ($(BR2_m68k_cf),y)
 CAIRO_CONF_ENV += CFLAGS="$(TARGET_CFLAGS) -mxgot"
@@ -27,7 +29,7 @@ endif
 # cairo can use C++11 atomics when available, so we need to link with
 # libatomic for the architectures who need libatomic.
 ifeq ($(BR2_TOOLCHAIN_HAS_LIBATOMIC),y)
-CAIRO_CONF_ENV += LIBS="-latomic"
+CAIRO_LIBS += -latomic
 endif
 
 CAIRO_CONF_OPTS = \
@@ -81,6 +83,11 @@ else
 CAIRO_CONF_OPTS += --disable-ft
 endif
 
+ifeq ($(BR2_PACKAGE_LIBEXECINFO),y)
+CAIRO_DEPENDENCIES += libexecinfo
+CAIRO_LIBS += -lexecinfo
+endif
+
 ifeq ($(BR2_PACKAGE_LIBGLIB2),y)
 CAIRO_CONF_OPTS += --enable-gobject
 CAIRO_DEPENDENCIES += libglib2