List zlib as another dependency of libbpf in pkg-config template.
Verified it is correctly resolved to proper -lz flag:
$ make DESTDIR=/tmp/libbpf-install install
$ pkg-config --libs /tmp/libbpf-install/usr/local/lib64/pkgconfig/libbpf.pc
-L/usr/local/lib64 -lbpf
$ pkg-config --libs --static /tmp/libbpf-install/usr/local/lib64/pkgconfig/libbpf.pc
-L/usr/local/lib64 -lbpf -lelf -lz
Fixes: 166750bc1dd2 ("libbpf: Support libbpf-provided extern variables")
Cc: Luca Boccassi <bluca@xxxxxxxxxx>
Signed-off-by: Andrii Nakryiko <andriin@xxxxxx>
---
tools/lib/bpf/libbpf.pc.template | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/lib/bpf/libbpf.pc.template b/tools/lib/bpf/libbpf.pc.template
index ac17fcef2108..b45ed534bdfb 100644
--- a/tools/lib/bpf/libbpf.pc.template
+++ b/tools/lib/bpf/libbpf.pc.template
@@ -8,5 +8,5 @@ Name: libbpf
Description: BPF library
Version: @VERSION@
Libs: -L${libdir} -lbpf
-Requires.private: libelf
+Requires.private: libelf zlib
Cflags: -I${includedir}
--
2.17.1
