[build] Fix Linux CI

This changes the Gnumake build to CMake + Ninja builds in order to fix linker issues in the CI.

.github/workflows/Linux_build.yml

@@ -71,7 +71,7 @@ jobs:
           wget -qO- https://apt.llvm.org/llvm-snapshot.gpg.key | sudo tee /etc/apt/trusted.gpg.d/apt.llvm.org.asc
           sudo apt-add-repository "deb http://apt.llvm.org/${UBUNTU_BASE}/ llvm-toolchain-${UBUNTU_BASE}-$LLVM_VERSION main"
           sudo apt-get -y update
-          sudo apt-get -y install mesa-vulkan-drivers valgrind libc++-dev libc++abi-dev libgtk-3-dev libsdl2-dev libvulkan-dev libx11-dev libx11-xcb-dev clang-$LLVM_VERSION clang-format-$LLVM_VERSION llvm-$LLVM_VERSION
+          sudo apt-get -y install mesa-vulkan-drivers valgrind libc++-dev libc++abi-dev libgtk-3-dev libsdl2-dev libvulkan-dev libx11-dev libx11-xcb-dev clang-$LLVM_VERSION clang-format-$LLVM_VERSION llvm-$LLVM_VERSION ninja-build cmake
           ./xb setup
       - name: Build
         run: ./xb build --config=Release

xenia-build

@@ -533,7 +533,7 @@ def run_platform_premake(target_os_override=None, cc='clang', devenv=None):
         elif target_os == 'android':
             devenv = 'androidndk'
         else:
-            devenv = 'gmake2'
+            devenv = 'cmake'
     if target_os != 'linux':
         cc = None
     return run_premake(target_os=target_os, action=devenv, cc=cc)
@@ -850,15 +850,26 @@ class BaseBuildCommand(Command):
             ] + scheme_args + pass_args, shell=False, env=dict(os.environ))
         else:
             result = subprocess.call([
-                'make',
-                '-j' if threads == 0 else '-j%d' % threads,
-                '-Cbuild/',
-                'config=%s_linux' % (args['config']),
-            ] + pass_args + args['target'], shell=False, env=dict(os.environ))
-        print('')
-        if result != 0:
-            print('ERROR: build failed with one or more errors.')
-            return result
+                'cmake',
+                '-S build/',
+                '-B build/build_%s' % (args['config']),
+                '-DCMAKE_BUILD_TYPE=%s' % (args['config'].title()),
+                '-DCMAKE_C_COMPILER=clang',
+                '-DCMAKE_CXX_COMPILER=clang++',
+                '-G Ninja'
+            ] + pass_args, shell=False, env=dict(os.environ))
+            print('')
+            if result != 0:
+                print('ERROR: cmake failed with one or more errors.')
+                return result
+            result = subprocess.call([
+                    'ninja',
+                    '-C./build/build_%s' % (args['config']),
+                    '-j' if threads == 0 else '-j%d' % threads,
+                ] + pass_args, shell=False, env=dict(os.environ))
+            if result != 0:
+                print('ERROR: ninja failed with one or more errors.')
+                return result
         return 0