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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 ${prefix} variable so that it can be overridden as needed. This also fixes the libxml2/host build issue raised at https://github.com/openwrt/packages/issues/6073 - it was caused by libxml2's configure picking up a wrong host search path through zlib.pc, letting it include the wrong endian.h, causing spurious member redeclaration errors in system headers. Signed-off-by: Jo-Philipp Wich <jo@mein.io>
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tools/zlib/patches/900-overridable-pc-exec-prefix.patch
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14
tools/zlib/patches/900-overridable-pc-exec-prefix.patch
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@ -0,0 +1,14 @@
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--- a/zlib.pc.cmakein
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+++ b/zlib.pc.cmakein
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@@ -1,8 +1,8 @@
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prefix=@CMAKE_INSTALL_PREFIX@
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exec_prefix=@CMAKE_INSTALL_PREFIX@
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-libdir=@INSTALL_LIB_DIR@
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-sharedlibdir=@INSTALL_LIB_DIR@
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-includedir=@INSTALL_INC_DIR@
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+libdir=${prefix}/lib
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+sharedlibdir=${prefix}/lib
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+includedir=${prefix}/include
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Name: zlib
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Description: zlib compression library
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