Don't strictly require inih

inih isn't used by anything in liblcf directly, relaxing this requirement
and allowing it to be disabled enables outside projects to more easily
integrate this library into their application.

This PR enables this while still making it the default, so the current behavior
is the default one requiring no changes in existing apps (easyrpg-player)

CMakeLists.txt

@@ -8,6 +8,7 @@ include(MiscUtils)
 
 # Compilation options
 option(BUILD_SHARED_LIBS "Build shared library, disable for building the static library (default: ON)" ON)
+option(LIBLCF_WITH_INIH "INI parsing support, (inih, default: ON)" ON)
 option(LIBLCF_WITH_ICU "ICU encoding handling (when disabled only windows-1252 is supported, default: ON)" ON)
 option(LIBLCF_WITH_XML "XML reading support (expat, default: ON)" ON)
 option(LIBLCF_UPDATE_MIMEDB "Whether to run update-mime-database after install (default: ON)" ON)
@@ -30,7 +31,6 @@ set(LCF_SOURCES
 	src/dbarray.cpp
 	src/dbstring_struct.cpp
 	src/encoder.cpp
-	src/inireader.cpp
 	src/ldb_equipment.cpp
 	src/ldb_eventcommand.cpp
 	src/ldb_parameters.cpp
@@ -203,7 +203,6 @@ set(LCF_HEADERS
 	src/lcf/encoder.h
 	src/lcf/enum_tags.h
 	src/lcf/flag_set.h
-	src/lcf/inireader.h
 	src/lcf/ldb/reader.h
 	src/lcf/lmt/reader.h
 	src/lcf/lmu/reader.h
@@ -295,6 +294,19 @@ set(LCF_HEADERS
 	src/lcf/third_party/string_view.h
 )
 
+
+
+set(LCF_SUPPORT_INIH 0)
+if(LIBLCF_WITH_INIH)
+	list(APPEND LCF_SOURCES
+		src/inireader.cpp
+	)
+	list(APPEND LCF_HEADERS
+		src/lcf/inireader.h
+	)
+	set(LCF_SUPPORT_INIH 1)
+endif()
+
 add_library(lcf ${LCF_SOURCES} ${LCF_HEADERS})
 
 # IDE source grouping
@@ -345,8 +357,10 @@ set_property(TARGET lcf PROPERTY WINDOWS_EXPORT_ALL_SYMBOLS ON)
 set_property(TARGET lcf PROPERTY EXPORT_NAME liblcf)
 
 # inih
-find_package(inih REQUIRED)
-target_link_libraries(lcf inih::inih)
+if (LCF_SUPPORT_INIH)
+	find_package(inih REQUIRED)
+	target_link_libraries(lcf inih::inih)
+endif ()
 
 # icu
 set(LCF_SUPPORT_ICU 0)