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tools: zlib: do not hardcode the install prefix in zlib.pc

Our pkg-config wrapper relies on the ability to redefine the $prefix and
$exec_prefix variables in order to construct proper search paths relative
to the build environment.

Patch the .pc file template to construct libdir, sharedlibdir and includedir
relative to the ${prefix} variable so that it can be overridden as needed.

This also fixes the libxml2/host build issue raised at
https://github.com/openwrt/packages/issues/6073 - it was caused by libxml2's
configure picking up a wrong host search path through zlib.pc, letting it
include the wrong endian.h, causing spurious member redeclaration errors in
system headers.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>
v19.07.3_mercusys_ac12_duma
Jo-Philipp Wich 4 years ago
parent
commit
4da832e201
  1. 14
      tools/zlib/patches/900-overridable-pc-exec-prefix.patch

14
tools/zlib/patches/900-overridable-pc-exec-prefix.patch

@ -0,0 +1,14 @@
--- a/zlib.pc.cmakein
+++ b/zlib.pc.cmakein
@@ -1,8 +1,8 @@
prefix=@CMAKE_INSTALL_PREFIX@
exec_prefix=@CMAKE_INSTALL_PREFIX@
-libdir=@INSTALL_LIB_DIR@
-sharedlibdir=@INSTALL_LIB_DIR@
-includedir=@INSTALL_INC_DIR@
+libdir=${prefix}/lib
+sharedlibdir=${prefix}/lib
+includedir=${prefix}/include
Name: zlib
Description: zlib compression library
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