Add test that builds public headers

src/CMakeLists.txt

@@ -138,6 +138,7 @@ if(SECP256K1_BUILD_TESTS)
     target_link_libraries(tests secp256k1_precomputed secp256k1_asm)
     add_test(NAME secp256k1_tests COMMAND tests)
   endif()
+  add_subdirectory(test)
 endif()
 
 if(SECP256K1_BUILD_EXHAUSTIVE_TESTS)

src/test/CMakeLists.txt

@@ -0,0 +1,18 @@
+# OBJECT library, because were are not interested in linking this.
+# EXCLUDE_FROM_ALL, because it is explicitly built as a test.
+add_library(secp256k1_build_public_headers OBJECT EXCLUDE_FROM_ALL
+  secp256k1.c
+  secp256k1_ecdh.c
+  secp256k1_ellswift.c
+  secp256k1_extrakeys.c
+  secp256k1_musig.c
+  secp256k1_preallocated.c
+  secp256k1_recovery.c
+  secp256k1_schnorrsig.c
+)
+
+add_test(NAME secp256k1_build_public_headers COMMAND ${CMAKE_COMMAND}
+  --build ${CMAKE_BINARY_DIR}
+  --target secp256k1_build_public_headers
+  --config $<CONFIG>
+)

src/test/secp256k1.c

@@ -0,0 +1 @@
+#include "../../include/secp256k1.h"

src/test/secp256k1_ecdh.c

@@ -0,0 +1 @@
+#include "../../include/secp256k1_ecdh.h"

src/test/secp256k1_ellswift.c

@@ -0,0 +1 @@
+#include "../../include/secp256k1_ellswift.h"

src/test/secp256k1_extrakeys.c

@@ -0,0 +1 @@
+#include "../../include/secp256k1_extrakeys.h"

src/test/secp256k1_musig.c

@@ -0,0 +1 @@
+#include "../../include/secp256k1_musig.h"

src/test/secp256k1_preallocated.c

@@ -0,0 +1 @@
+#include "../../include/secp256k1_preallocated.h"

src/test/secp256k1_recovery.c

@@ -0,0 +1 @@
+#include "../../include/secp256k1_recovery.h"

src/test/secp256k1_schnorrsig.c

@@ -0,0 +1 @@
+#include "../../include/secp256k1_schnorrsig.h"