(experimental) libeuropa: Make libeuropa a shared library

Bleh. Might as well.

NO ABI GUARANTEES UNTIL A REAL 1.0.0 RELEASE.

CMakeLists.txt

@@ -14,7 +14,7 @@ if(" ${CMAKE_SOURCE_DIR}" STREQUAL " ${CMAKE_BINARY_DIR}")
 endif()
 
 project(EuropaTools
-        VERSION 1.0.0
+        VERSION 0.5.0
         LANGUAGES C CXX
         DESCRIPTION "Tools for working with LEC Europa based games (Star Wars: Starfighter & Star Wars: Jedi Starfighter)"
         )

cmake/CompilerFlags-GNU.cmake

@@ -1,6 +1,6 @@
 # TODO: This currently assumes libstdc++, later on we should *probably* set this with some detection
 # also TODO: Use a list so that this isn't one giant line (list JOIN should help.)
-set(EUROPA_CORE_COMPILE_ARGS "-Wall -Wextra -Wformat=2 -Wimplicit-fallthrough -fvisibility=hidden")
+set(EUROPA_CORE_COMPILE_ARGS "-Wall -Wextra -Wformat=2 -Wimplicit-fallthrough")
 set(EUROPA_CORE_LINKER_ARGS "-fuse-ld=${EUROPA_LINKER}")
 
 if("${CMAKE_BUILD_TYPE}" STREQUAL "Release") # OR "${CMAKE_BUILD_TYPE}" STREQUAL "RelWithDebInfo"

src/libeuropa/CMakeLists.txt

@@ -6,7 +6,14 @@
 # SPDX-License-Identifier: MIT
 #
 
-add_library(europa
+# NOTICE: libeuropa in shared form does not have a stable ABI yet, 
+# and more than likely, until a defined semver release
+# never will.
+#
+# There will probably be an option or additional target always
+# to build static libeuropa.
+
+add_library(europa SHARED
 		# Utility
 		util/ImageSurface.cpp
 
@@ -24,3 +31,6 @@ add_library(europa
 target_include_directories(europa PUBLIC ${PROJECT_SOURCE_DIR}/include)
 
 target_compile_features(europa PUBLIC cxx_std_20)
+
+# SOversion for *ix.
+set_target_properties(europa PROPERTIES VERSION ${PROJECT_VERSION} SOVERSION 0)