userspace: Add empty libm and libpthread

These making porting stuff easier. I could not find a way to tell CMake
that the system does not have threads library

userspace/libraries/CMakeLists.txt

@@ -5,6 +5,8 @@ set(USERSPACE_LIBRARIES
 	LibGUI
 	LibImage
 	LibInput
+	LibMath
+	LibPthread
 )
 
 foreach(library ${USERSPACE_LIBRARIES})

userspace/libraries/LibMath/CMakeLists.txt

@@ -0,0 +1,18 @@
+set(SOURCES
+	dummy.cpp
+)
+
+add_library(libmath-static STATIC ${SOURCES})
+add_library(libmath-shared SHARED ${SOURCES})
+
+target_link_options(libmath-static PRIVATE -nolibc)
+target_link_options(libmath-shared PRIVATE -nolibc)
+
+banan_link_library(libmath-static libc)
+banan_link_library(libmath-shared libc)
+
+set_target_properties(libmath-static PROPERTIES OUTPUT_NAME libm)
+set_target_properties(libmath-shared PROPERTIES OUTPUT_NAME libm)
+
+install(TARGETS libmath-static OPTIONAL)
+install(TARGETS libmath-shared OPTIONAL)

userspace/libraries/LibPthread/CMakeLists.txt

@@ -0,0 +1,18 @@
+set(SOURCES
+	dummy.cpp
+)
+
+add_library(libpthread-static STATIC ${SOURCES})
+add_library(libpthread-shared SHARED ${SOURCES})
+
+target_link_options(libpthread-static PRIVATE -nolibc)
+target_link_options(libpthread-shared PRIVATE -nolibc)
+
+banan_link_library(libpthread-static libc)
+banan_link_library(libpthread-shared libc)
+
+set_target_properties(libpthread-static PROPERTIES OUTPUT_NAME libpthread)
+set_target_properties(libpthread-shared PROPERTIES OUTPUT_NAME libpthread)
+
+install(TARGETS libpthread-static OPTIONAL)
+install(TARGETS libpthread-shared OPTIONAL)