OpenEXR.pc is not created during "configure" stage.

[jdx-gh]

The patch is based on suitable part of top level CMakeLists.txt from IlmBase-2.2.0.

--- /d/Works/openexr-2.2.0/CMakeLists.txt   2014-08-10 06:23:56 +0200
+++ /d/Works/openexr-2.2.0-new/CMakeLists.txt   2015-09-26 15:20:09 +0200
@@ -258,3 +258,23 @@
   DESTINATION
   ${CMAKE_INSTALL_PREFIX}/share/doc/OpenEXR-${OPENEXR_VERSION}/examples
   )
+
+# OpenEXR.pc
+FILE ( WRITE ${CMAKE_BINARY_DIR}/OpenEXR.pc "prefix=${CMAKE_INSTALL_PREFIX}\n" )
+FILE ( APPEND ${CMAKE_BINARY_DIR}/OpenEXR.pc "exec_prefix=\${prefix}
+libdir=\${exec_prefix}/lib
+includedir=\${prefix}/include
+OpenEXR_includedir=\${prefix}/include/OpenEXR
+
+Name: OpenEXR
+Description: OpenEXR library
+Version: ${OPENEXR_VERSION}
+Libs: -L\${libdir} -lIlmImfUtil${OPENEXR_LIBSUFFIX} -lIlmImf${OPENEXR_LIBSUFFIX} -lImath${ILMBASE_LIBSUFFIX} -lIexMath${ILMBASE_LIBSUFFIX} -lHalf -lIex${ILMBASE_LIBSUFFIX} -lIlmThread${ILMBASE_LIBSUFFIX} -pthread
+Cflags: -pthread -I\${OpenEXR_includedir}
+")
+
+INSTALL ( FILES
+  ${CMAKE_BINARY_DIR}/OpenEXR.pc
+  DESTINATION
+  lib/pkgconfig
+)

[dracwyrm]

In PR #242 which switched everything over to GNUInstallDirs and also added the Libs.private line to the OpenEXR.pc file. This is the version I came up with, note: prefix and exec_prefix are not needed anymore.:

+libdir=@CMAKE_INSTALL_FULL_LIBDIR@
 +includedir=@CMAKE_INSTALL_FULL_INCLUDEDIR@
 +OpenEXR_includedir=@CMAKE_INSTALL_FULL_INCLUDEDIR@/OpenEXR
 +
 +Name: OpenEXR
 +Description: OpenEXR image library
 +Version: @OPENEXR_VERSION@
 +
 +Libs: -L${libdir} -lIlmImf@OPENEXR_LIBSUFFIX@ -lIlmImfUtil@OPENEXR_LIBSUFFIX@
 +Cflags: -I${OpenEXR_includedir}
 +Requires: IlmBase
 +Libs.private: -lz

Just thought I'd mention it here, as I hope GNUInstallDirs PR can be merged for 2.2.1.

[kdt3rd]

A complete refactor of the cmake has taken place, modernizing cmake to match the "Modern CMake" guidelines and practices, and there is an option whether to generate pc files from cmake, and uses cmake configure_file to edit the *.pc.in to the desired install path, so this should be fixed in the next release we make (if you want to test the master branch, and report any issues, that would be awesome). Thanks for the report!