Revert "More conversions from pkg-config variables to imported targets."

This reverts commit 1a9fcfefad because
on MinGW cmake complains about the paths in pkgconfig files. This can
be addressed by using the MSYS2 cmake instead of the MINGW32 one, but
that requires some other changes... and there's also a path separator
bug in that version of FindPkgConfig.cmake.

libgnucash/gnc-module/CMakeLists.txt

@@ -24,14 +24,16 @@ add_library	(gnc-module
   ${SWIG_GNC_MODULE_C}
 )
 
-target_link_libraries(gnc-module PkgConfig::GUILE PkgConfig::GMODULE PkgConfig::GLIB2)
+target_link_libraries(gnc-module ${GUILE_LDFLAGS} ${GMODULE_LDFLAGS} ${GLIB2_LDFLAGS})
 
 target_compile_definitions (gnc-module PRIVATE -DG_LOG_DOMAIN=\"gnc.module\")
 
 target_include_directories (gnc-module
+    PRIVATE ${GUILE_INCLUDE_DIRS}
     PUBLIC  ${CMAKE_CURRENT_SOURCE_DIR}
             ${CMAKE_SOURCE_DIR}/common
             ${CMAKE_BINARY_DIR}/common # for config.h
+            ${GLIB2_INCLUDE_DIRS}
 )
 
 install(TARGETS gnc-module

libgnucash/gnc-module/test/CMakeLists.txt

@@ -8,6 +8,8 @@ set(GNC_MODULE_TEST_INCLUDE_DIRS
   ${CMAKE_BINARY_DIR}/common # for config.h
   ${CMAKE_SOURCE_DIR}/libgnucash/gnc-module
   ${CMAKE_SOURCE_DIR}/common/test-core
+  ${GLIB2_INCLUDE_DIRS}
+  ${GUILE_INCLUDE_DIRS}
 )
 
 set(GNC_MODULE_TEST_LIBS

libgnucash/gnc-module/test/misc-mods/CMakeLists.txt

@@ -1,16 +1,17 @@
 
 INCLUDE_DIRECTORIES(
   ${CMAKE_SOURCE_DIR}/libgnucash/gnc-module
+  ${GLIB2_INCLUDE_DIRS}
 )
 
 add_library(gncmod-agedver EXCLUDE_FROM_ALL agedver.c)
-target_link_libraries(gncmod-agedver PkgConfig::GLIB2)
+target_link_libraries(gncmod-agedver ${GLIB2_LDFLAGS})
 
 add_library(gncmod-futuremodsys  EXCLUDE_FROM_ALL futuremodsys.c)
-target_link_libraries(gncmod-futuremodsys PkgConfig::GLIB2)
+target_link_libraries(gncmod-futuremodsys ${GLIB2_LDFLAGS})
 
 add_library(gncmod-incompatdep  EXCLUDE_FROM_ALL incompatdep.c)
-target_link_libraries(gncmod-incompatdep gnc-module PkgConfig::GLIB2)
+target_link_libraries(gncmod-incompatdep gnc-module ${GLIB2_LDFLAGS})
 
 set_target_properties(gncmod-agedver gncmod-futuremodsys gncmod-incompatdep PROPERTIES
 LIBRARY_OUTPUT_DIRECTORY ${LIBDIR_BUILD}/gnucash/test

libgnucash/gnc-module/test/mod-bar/CMakeLists.txt

@@ -15,6 +15,8 @@ target_include_directories(gncmod-bar PRIVATE
   ${CMAKE_CURRENT_BINARY_DIR}
   ${CMAKE_SOURCE_DIR}/common
   ${CMAKE_SOURCE_DIR}/libgnucash/gnc-module
+  ${GLIB2_INCLUDE_DIRS}
+  ${GUILE_INCLUDE_DIRS}
 )
 
 gnc_add_scheme_test_targets(scm-mod-bar

libgnucash/gnc-module/test/mod-baz/CMakeLists.txt

@@ -21,6 +21,8 @@ target_include_directories(gncmod-baz PRIVATE
   ${CMAKE_CURRENT_BINARY_DIR}
   ${CMAKE_SOURCE_DIR}/common
   ${CMAKE_SOURCE_DIR}/libgnucash/gnc-module
+  ${GLIB2_INCLUDE_DIRS}
+  ${GUILE_INCLUDE_DIRS}
 )
 
 gnc_add_scheme_test_targets(scm-mod-baz

libgnucash/gnc-module/test/mod-foo/CMakeLists.txt

@@ -15,6 +15,8 @@ target_include_directories(gncmod-foo PRIVATE
   ${CMAKE_CURRENT_BINARY_DIR}
   ${CMAKE_SOURCE_DIR}/common
   ${CMAKE_SOURCE_DIR}/libgnucash/gnc-module
+  ${GLIB2_INCLUDE_DIRS}
+  ${GUILE_INCLUDE_DIRS}
 )
 
 gnc_add_scheme_test_targets(scm-mod-foo