ci: add a test that the amalgamation build correctly

Author: jgriffiths

.gitlab-ci.yml

@@ -109,3 +109,14 @@ cmake-test:
       coverage_report:
         coverage_format: cobertura
         path: coverage.xml
+
+amalgamation-test:
+  image: greenaddress/wallycore@sha256:956b107d688f549c6e3884424991b7d3d34d84173990d43046fd760d7918db7c
+  tags:
+    - ga
+  script:
+    - touch config.h
+    - gcc -Wall -W -Wextra -Werror -I. -I./src -I./src/ccan -I./src/secp256k1/include src/ctest/amalgamation_compile_test.c
+    - gcc -DBUILD_ELEMENTS -Wall -W -Wextra -Werror -I. -I./src -I./src/ccan -I./src/secp256k1/include src/ctest/amalgamation_compile_test.c
+    - clang -Wall -W -Wextra -Werror -I. -I./src -I./src/ccan -I./src/secp256k1/include src/ctest/amalgamation_compile_test.c
+    - clang -DBUILD_ELEMENTS -Wall -W -Wextra -Werror -I. -I./src -I./src/ccan -I./src/secp256k1/include src/ctest/amalgamation_compile_test.c

src/ctest/amalgamation_compile_test.c

@@ -0,0 +1,11 @@
+/* Tests that including the entire library as a single source file works */
+#include "../amalgamation/combined.c"
+
+int main(int argc, char *argv[])
+{
+    (void) argc;
+    (void) argv;
+
+    wally_init(0);
+    return wally_cleanup(0);
+}