Install CMake package version file

CMakeLists.txt

@@ -282,22 +282,6 @@ foreach(_test IN LISTS AKERR_TESTS)
     endif()
 endforeach()
 
-# The ignored-error slot is declared in the public header but must have one
-# library definition. Compare its address from two translation units, and
-# compile the consumer-facing test with all ordinary warnings enabled: a
-# header-local TLS definition would both duplicate storage and warn when unused.
-add_executable(test_err_ignore_multitu
-               tests/err_ignore_multitu.c
-               tests/err_ignore_multitu_helper.c)
-target_include_directories(test_err_ignore_multitu
-                           PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/tests)
-target_link_libraries(test_err_ignore_multitu PRIVATE akerror)
-target_compile_options(test_err_ignore_multitu PRIVATE -Wall -Wextra -Werror)
-if(AKERR_THREAD_SAFE)
-    target_link_libraries(test_err_ignore_multitu PRIVATE Threads::Threads)
-endif()
-add_test(NAME err_ignore_multitu COMMAND test_err_ignore_multitu)
-
 # HANDLE_GROUP deliberately enters the next case label. Keep that public macro
 # compiling with the warning enabled, so a future macro edit cannot restore the
 # warning for consumers which adopt -Wextra.
@@ -377,8 +361,17 @@ configure_package_config_file(
     INSTALL_DESTINATION ${akerror_install_cmakedir}
 )
 
+# The SOVERSION is the project major version, so packages with the same major
+# are ABI-compatible and a different major must be rejected.
+write_basic_package_version_file(
+    "${CMAKE_CURRENT_BINARY_DIR}/akerrorConfigVersion.cmake"
+    VERSION ${PROJECT_VERSION}
+    COMPATIBILITY SameMajorVersion
+)
+
 install(FILES
     "${CMAKE_CURRENT_BINARY_DIR}/akerrorConfig.cmake"
+    "${CMAKE_CURRENT_BINARY_DIR}/akerrorConfigVersion.cmake"
     DESTINATION ${akerror_install_cmakedir}
 )
 

tests/err_ignore_multitu.c

@@ -1,18 +0,0 @@
-#include "akerror.h"
-#include "err_ignore_multitu.h"
-#include <stdio.h>
-
-int main(void)
-{
-    akerr_ErrorContext **main_address = &__akerr_last_ignored;
-    akerr_ErrorContext **helper_address = akerr_multitu_snapshot_address();
-
-    if ( main_address != helper_address ) {
-	fprintf(stderr,
-		"CHECK FAILED: ignored-error storage differs between translation units\n");
-	return 1;
-    }
-
-    fprintf(stderr, "err_ignore_multitu ok\n");
-    return 0;
-}

tests/err_ignore_multitu.h

@@ -1,8 +0,0 @@
-#ifndef AKERR_TEST_IGNORE_MULTITU_H
-#define AKERR_TEST_IGNORE_MULTITU_H
-
-#include "akerror.h"
-
-akerr_ErrorContext **akerr_multitu_snapshot_address(void);
-
-#endif

tests/err_ignore_multitu_helper.c

@@ -1,6 +0,0 @@
-#include "err_ignore_multitu.h"
-
-akerr_ErrorContext **akerr_multitu_snapshot_address(void)
-{
-    return &__akerr_last_ignored;
-}