Find libraries with pkgconfig

This is necessary for Flatpak, because Yocto messes with the
/usr/bin/*-config files, and really wants everyone to use pkgconfig.

A fallback is kept to build on platforms which don't have pkgconfig for
those libraries.

3 files changed, 111 insertions, 108 deletions

diff --git a/cmake/FindGCrypt.cmake b/cmake/FindGCrypt.cmake
index 250f90c9..94c4c3f4 100644
--- a/cmake/FindGCrypt.cmake
+++ b/cmake/FindGCrypt.cmake
@@ -1,57 +1,8 @@
-set(GCrypt_PKG_CONFIG_NAME gcrypt)
-
-find_program(GCrypt_CONFIG_EXECUTABLE NAMES libgcrypt-config)
-mark_as_advanced(GCrypt_CONFIG_EXECUTABLE)
-find_program(GCrypt_SH_EXECUTABLE NAMES sh)
-mark_as_advanced(GCrypt_SH_EXECUTABLE)
-
-
-if(GCrypt_CONFIG_EXECUTABLE)
-    macro(gcrypt_config_fail errcode)
-        if(${errcode})
-            message(FATAL_ERROR "Error invoking libgcrypt-config: ${errcode}")
-        endif(${errcode})
-    endmacro(gcrypt_config_fail)
-    file(TO_NATIVE_PATH "${GCrypt_CONFIG_EXECUTABLE}" GCrypt_CONFIG_EXECUTABLE)
-    file(TO_NATIVE_PATH "${GCrypt_SH_EXECUTABLE}" GCrypt_SH_EXECUTABLE)
-
-    execute_process(COMMAND "${GCrypt_SH_EXECUTABLE}" "${GCrypt_CONFIG_EXECUTABLE}" --version
-                    OUTPUT_VARIABLE GCrypt_VERSION
-                    RESULT_VARIABLE ERRCODE
-                    OUTPUT_STRIP_TRAILING_WHITESPACE)
-    gcrypt_config_fail(${ERRCODE})
-
-    execute_process(COMMAND "${GCrypt_SH_EXECUTABLE}" "${GCrypt_CONFIG_EXECUTABLE}" --api-version
-                    OUTPUT_VARIABLE GCrypt_API_VERSION
-                    RESULT_VARIABLE ERRCODE
-                    OUTPUT_STRIP_TRAILING_WHITESPACE)
-    gcrypt_config_fail(${ERRCODE})
-
-    execute_process(COMMAND "${GCrypt_SH_EXECUTABLE}" "${GCrypt_CONFIG_EXECUTABLE}" --cflags
-                    OUTPUT_VARIABLE GCrypt_CFLAGS
-                    RESULT_VARIABLE ERRCODE
-                    OUTPUT_STRIP_TRAILING_WHITESPACE)
-    gcrypt_config_fail(${ERRCODE})
-
-    execute_process(COMMAND "${GCrypt_SH_EXECUTABLE}" "${GCrypt_CONFIG_EXECUTABLE}" --libs
-                    OUTPUT_VARIABLE GCrypt_LDFLAGS
-                    RESULT_VARIABLE ERRCODE
-                    OUTPUT_STRIP_TRAILING_WHITESPACE)
-    gcrypt_config_fail(${ERRCODE})
-
-    string(REGEX REPLACE "^(.* |)-l([^ ]*gcrypt[^ ]*)( .*|)$" "\\2" GCrypt_LIBRARY_NAME "${GCrypt_LDFLAGS}")
-    string(REGEX REPLACE "^(.* |)-L([^ ]*)( .*|)$" "\\2" GCrypt_LIBRARY_DIRS "${GCrypt_LDFLAGS}")
-    find_library(GCrypt_LIBRARY ${GCrypt_LIBRARY_NAME} HINTS ${GCrypt_LIBRARY_DIRS})
-    mark_as_advanced(GCrypt_LIBRARY)
-    unset(GCrypt_LIBRARY_NAME)
-    unset(GCrypt_LIBRARY_DIRS)
-
-    if(NOT TARGET gcrypt)
-        add_library(gcrypt INTERFACE IMPORTED)
-        set_property(TARGET gcrypt PROPERTY INTERFACE_LINK_LIBRARIES "${GCrypt_LDFLAGS}")
-        set_property(TARGET gcrypt PROPERTY INTERFACE_COMPILE_OPTIONS "${GCrypt_CFLAGS}")
-    endif(NOT TARGET gcrypt)
-endif(GCrypt_CONFIG_EXECUTABLE)
+include(PkgConfigWithFallbackOnConfigScript)
+find_pkg_config_with_fallback_on_config_script(GCrypt
+    PKG_CONFIG_NAME libgcrypt
+    CONFIG_SCRIPT_NAME libgcrypt
+)
 
 include(FindPackageHandleStandardArgs)
 find_package_handle_standard_args(GCrypt
diff --git a/cmake/FindGPGME.cmake b/cmake/FindGPGME.cmake
index 2ab06d8c..b402020d 100644
--- a/cmake/FindGPGME.cmake
+++ b/cmake/FindGPGME.cmake
@@ -1,57 +1,8 @@
-set(GPGME_PKG_CONFIG_NAME gpgme)
-
-find_program(GPGME_CONFIG_EXECUTABLE NAMES gpgme-config)
-mark_as_advanced(GPGME_CONFIG_EXECUTABLE)
-find_program(GPGME_SH_EXECUTABLE NAMES sh)
-mark_as_advanced(GPGME_SH_EXECUTABLE)
-
-
-if(GPGME_CONFIG_EXECUTABLE)
-    macro(gpgme_config_fail errcode)
-        if(${errcode})
-            message(FATAL_ERROR "Error invoking gpgme-config: ${errcode}")
-        endif(${errcode})
-    endmacro(gpgme_config_fail)
-    file(TO_NATIVE_PATH "${GPGME_CONFIG_EXECUTABLE}" GPGME_CONFIG_EXECUTABLE)
-    file(TO_NATIVE_PATH "${GPGME_SH_EXECUTABLE}" GPGME_SH_EXECUTABLE)
-
-    execute_process(COMMAND "${GPGME_SH_EXECUTABLE}" "${GPGME_CONFIG_EXECUTABLE}" --version
-                    OUTPUT_VARIABLE GPGME_VERSION
-                    RESULT_VARIABLE ERRCODE
-                    OUTPUT_STRIP_TRAILING_WHITESPACE)
-    gpgme_config_fail(${ERRCODE})
-
-    execute_process(COMMAND "${GPGME_SH_EXECUTABLE}" "${GPGME_CONFIG_EXECUTABLE}" --api-version
-                    OUTPUT_VARIABLE GPGME_API_VERSION
-                    RESULT_VARIABLE ERRCODE
-                    OUTPUT_STRIP_TRAILING_WHITESPACE)
-    gpgme_config_fail(${ERRCODE})
-
-    execute_process(COMMAND "${GPGME_SH_EXECUTABLE}" "${GPGME_CONFIG_EXECUTABLE}" --cflags
-                    OUTPUT_VARIABLE GPGME_CFLAGS
-                    RESULT_VARIABLE ERRCODE
-                    OUTPUT_STRIP_TRAILING_WHITESPACE)
-    gpgme_config_fail(${ERRCODE})
-
-    execute_process(COMMAND "${GPGME_SH_EXECUTABLE}" "${GPGME_CONFIG_EXECUTABLE}" --libs
-                    OUTPUT_VARIABLE GPGME_LDFLAGS
-                    RESULT_VARIABLE ERRCODE
-                    OUTPUT_STRIP_TRAILING_WHITESPACE)
-    gpgme_config_fail(${ERRCODE})
-
-    string(REGEX REPLACE "^(.* |)-l([^ ]*gpgme[^ ]*)( .*|)$" "\\2" GPGME_LIBRARY_NAME "${GPGME_LDFLAGS}")
-    string(REGEX REPLACE "^(.* |)-L([^ ]*)( .*|)$" "\\2" GPGME_LIBRARY_DIRS "${GPGME_LDFLAGS}")
-    find_library(GPGME_LIBRARY ${GPGME_LIBRARY_NAME} HINTS ${GPGME_LIBRARY_DIRS})
-    mark_as_advanced(GPGME_LIBRARY)
-    unset(GPGME_LIBRARY_NAME)
-    unset(GPGME_LIBRARY_DIRS)
-
-    if(NOT TARGET gpgme)
-        add_library(gpgme INTERFACE IMPORTED)
-        set_property(TARGET gpgme PROPERTY INTERFACE_LINK_LIBRARIES "${GPGME_LDFLAGS}")
-        set_property(TARGET gpgme PROPERTY INTERFACE_COMPILE_OPTIONS "${GPGME_CFLAGS}")
-    endif(NOT TARGET gpgme)
-endif(GPGME_CONFIG_EXECUTABLE)
+include(PkgConfigWithFallbackOnConfigScript)
+find_pkg_config_with_fallback_on_config_script(GPGME
+    PKG_CONFIG_NAME gpgme
+    CONFIG_SCRIPT_NAME gpgme
+)
 
 include(FindPackageHandleStandardArgs)
 find_package_handle_standard_args(GPGME
diff --git a/cmake/PkgConfigWithFallbackOnConfigScript.cmake b/cmake/PkgConfigWithFallbackOnConfigScript.cmake
new file mode 100644
index 00000000..563e4ab3
--- /dev/null
+++ b/cmake/PkgConfigWithFallbackOnConfigScript.cmake
@@ -0,0 +1,101 @@
+include(CMakeParseArguments)
+
+function(find_pkg_config_with_fallback_on_config_script name)
+    cmake_parse_arguments(ARGS "" "PKG_CONFIG_NAME" "CONFIG_SCRIPT_NAME" ${ARGN})
+    set(${name}_PKG_CONFIG_NAME ${ARGS_PKG_CONFIG_NAME} PARENT_SCOPE)
+    find_package(PkgConfig)
+
+    if(PKG_CONFIG_FOUND)
+        pkg_search_module(${name}_PKG_CONFIG QUIET ${ARGS_PKG_CONFIG_NAME})
+    endif(PKG_CONFIG_FOUND)
+
+    if (${name}_PKG_CONFIG_FOUND)
+        # Found via pkg-config, using it's result values
+        set(${name}_FOUND ${${name}_PKG_CONFIG_FOUND})
+
+        # Try to find real file name of libraries
+        foreach(lib ${${name}_PKG_CONFIG_LIBRARIES})
+            find_library(${name}_${lib}_LIBRARY ${lib} HINTS ${${name}_PKG_CONFIG_LIBRARY_DIRS})
+            mark_as_advanced(${name}_${lib}_LIBRARY)
+            if(NOT ${name}_${lib}_LIBRARY)
+                unset(${name}_FOUND)
+            endif(NOT ${name}_${lib}_LIBRARY)
+        endforeach(lib)
+        if(${name}_FOUND)
+            set(${name}_LIBRARIES "")
+            foreach(lib ${${name}_PKG_CONFIG_LIBRARIES})
+                list(APPEND ${name}_LIBRARIES ${${name}_${lib}_LIBRARY})
+            endforeach(lib)
+            list(REMOVE_DUPLICATES ${name}_LIBRARIES)
+            set(${name}_LIBRARIES ${${name}_LIBRARIES} PARENT_SCOPE)
+            list(GET ${name}_LIBRARIES "0" ${name}_LIBRARY)
+
+            set(${name}_FOUND ${${name}_FOUND} PARENT_SCOPE)
+            set(${name}_INCLUDE_DIRS ${${name}_PKG_CONFIG_INCLUDE_DIRS} PARENT_SCOPE)
+            set(${name}_LIBRARIES ${${name}_PKG_CONFIG_LIBRARIES} PARENT_SCOPE)
+            set(${name}_LIBRARY ${${name}_LIBRARY} PARENT_SCOPE)
+            set(${name}_VERSION ${${name}_PKG_CONFIG_VERSION} PARENT_SCOPE)
+
+            if(NOT TARGET ${ARGS_PKG_CONFIG_NAME})
+                add_library(${ARGS_PKG_CONFIG_NAME} INTERFACE IMPORTED)
+                set_property(TARGET ${ARGS_PKG_CONFIG_NAME} PROPERTY INTERFACE_COMPILE_OPTIONS "${${name}_PKG_CONFIG_CFLAGS_OTHER}")
+                set_property(TARGET ${ARGS_PKG_CONFIG_NAME} PROPERTY INTERFACE_INCLUDE_DIRECTORIES "${${name}_PKG_CONFIG_INCLUDE_DIRS}")
+                set_property(TARGET ${ARGS_PKG_CONFIG_NAME} PROPERTY INTERFACE_LINK_LIBRARIES "${${name}_LIBRARIES}")
+            endif(NOT TARGET ${ARGS_PKG_CONFIG_NAME})
+        endif(${name}_FOUND)
+    else(${name}_PKG_CONFIG_FOUND)
+        # No success with pkg-config, try via custom a *-config script
+        find_program(${name}_CONFIG_EXECUTABLE NAMES ${ARGS_CONFIG_SCRIPT_NAME}-config)
+        mark_as_advanced(${name}_CONFIG_EXECUTABLE)
+        find_program(${name}_SH_EXECUTABLE NAMES sh)
+        mark_as_advanced(${name}_SH_EXECUTABLE)
+
+        if(${name}_CONFIG_EXECUTABLE)
+            macro(config_script_fail errcode)
+                if(${errcode})
+                    message(FATAL_ERROR "Error invoking ${ARGS_CONFIG_SCRIPT_NAME}-config: ${errcode}")
+                endif(${errcode})
+            endmacro(config_script_fail)
+            file(TO_NATIVE_PATH "${${name}_CONFIG_EXECUTABLE}" ${name}_CONFIG_EXECUTABLE)
+            file(TO_NATIVE_PATH "${${name}_SH_EXECUTABLE}" ${name}_SH_EXECUTABLE)
+
+            execute_process(COMMAND "${${name}_SH_EXECUTABLE}" "${${name}_CONFIG_EXECUTABLE}" --version
+                            OUTPUT_VARIABLE ${name}_VERSION
+                            RESULT_VARIABLE ERRCODE
+                            OUTPUT_STRIP_TRAILING_WHITESPACE)
+            config_script_fail(${ERRCODE})
+
+            execute_process(COMMAND "${${name}_SH_EXECUTABLE}" "${${name}_CONFIG_EXECUTABLE}" --api-version
+                            OUTPUT_VARIABLE ${name}_API_VERSION
+                            RESULT_VARIABLE ERRCODE
+                            OUTPUT_STRIP_TRAILING_WHITESPACE)
+            config_script_fail(${ERRCODE})
+
+            execute_process(COMMAND "${${name}_SH_EXECUTABLE}" "${${name}_CONFIG_EXECUTABLE}" --cflags
+                            OUTPUT_VARIABLE ${name}_CFLAGS
+                            RESULT_VARIABLE ERRCODE
+                            OUTPUT_STRIP_TRAILING_WHITESPACE)
+            config_script_fail(${ERRCODE})
+
+            execute_process(COMMAND "${${name}_SH_EXECUTABLE}" "${${name}_CONFIG_EXECUTABLE}" --libs
+                            OUTPUT_VARIABLE ${name}_LDFLAGS
+                            RESULT_VARIABLE ERRCODE
+                            OUTPUT_STRIP_TRAILING_WHITESPACE)
+            config_script_fail(${ERRCODE})
+
+            string(TOLOWER ${name} "${name}_LOWER")
+            string(REGEX REPLACE "^(.* |)-l([^ ]*${${name}_LOWER}[^ ]*)( .*|)$" "\\2" ${name}_LIBRARY_NAME "${${name}_LDFLAGS}")
+            string(REGEX REPLACE "^(.* |)-L([^ ]*)( .*|)$" "\\2" ${name}_LIBRARY_DIRS "${${name}_LDFLAGS}")
+            find_library(${name}_LIBRARY ${${name}_LIBRARY_NAME} HINTS ${${name}_LIBRARY_DIRS})
+            mark_as_advanced(${name}_LIBRARY)
+            unset(${name}_LIBRARY_NAME)
+            unset(${name}_LIBRARY_DIRS)
+
+            if(NOT TARGET ${name}_LOWER)
+                add_library(${name}_LOWER INTERFACE IMPORTED)
+                set_property(TARGET ${name}_LOWER PROPERTY INTERFACE_LINK_LIBRARIES "${${name}_LDFLAGS}")
+                set_property(TARGET ${name}_LOWER PROPERTY INTERFACE_COMPILE_OPTIONS "${${name}_CFLAGS}")
+            endif(NOT TARGET ${name}_LOWER)
+        endif(${name}_CONFIG_EXECUTABLE)
+    endif(${name}_PKG_CONFIG_FOUND)
+endfunction()