GitLab CI: try compiling with dummy interface with musl

.gitlab-ci.yml

@@ -419,6 +419,43 @@ Debian stable Clang:
           # make
           echo -e "\e[0Ksection_end:`date +%s`:make\r\e[0K"
 
+Debian stable musl:
+  stage: build
+
+  allow_failure: true
+
+  artifacts:
+    name: "$CI_PROJECT_PATH_SLUG-$CI_COMMIT_REF_SLUG-$CI_COMMIT_SHORT_SHA-musl"
+
+  variables:
+    CC: musl-gcc
+    LDD: musl-ldd
+
+  script:
+    - - |
+          # apt_toolchain
+          echo -e "\e[0Ksection_start:`date +%s`:apt_toolchain[collapsed=true]\r\e[0KInstalling toolchain packages"
+      - apt-get install gcc
+      - |
+          # apt_toolchain
+          echo -e "\e[0Ksection_end:`date +%s`:apt_toolchain\r\e[0K"
+
+    - - |
+          # apt_development
+          echo -e "\e[0Ksection_start:`date +%s`:apt_development[collapsed=true]\r\e[0KInstalling development packages"
+      - apt-get install musl-tools
+      - |
+          # apt_development
+          echo -e "\e[0Ksection_end:`date +%s`:apt_development\r\e[0K"
+
+    - - |
+          # make
+          echo -e "\e[0Ksection_start:`date +%s`:make[collapsed=false]\r\e[0KCompiling SRB2"
+      - make --directory=src --keep-going CCACHE=1 ERRORMODE=1 NONX86=1 SDL=0 NOHW=1 NOZLIB=1 NOCURL=1 NOGME=1 NOOPENMPT=1 || make --directory=src --keep-going CCACHE=1 ERRORMODE=1 NONX86=1 SDL=0 NOHW=1 NOZLIB=1 NOCURL=1 NOGME=1 NOOPENMPT=1
+      - |
+          # make
+          echo -e "\e[0Ksection_end:`date +%s`:make\r\e[0K"
+
 Debian testing Clang:
   extends: Debian stable Clang