GCC 15 Workaround (#20)

Author: marvinfriede

README.md

@@ -15,7 +15,14 @@ a Fortran compiler supporting Fortran 2008 and one of the supported build system
   a build-system backend, *i.e.* [ninja](https://ninja-build.org) version 1.10 or newer
 - [fpm](https://github.com/fortran-lang/fpm) version 0.2.0 or newer
 
-Supported for this project are GCC and Intel compilers.
+Currently, this project supports GCC and Intel compilers.
+
+<details>
+<summary>Problematic Versions</summary>
+
+GCC versions 15.0.x - 15.1.x contain a [compiler bug](https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119928) leading to "Interface mismatch" errors during compilation.
+
+</details>
 
 
 ### Building with meson

config/CMakeLists.txt

@@ -34,6 +34,21 @@ set(
 )
 set(module-dir "${module-dir}" PARENT_SCOPE)
 
+
+# Compiler-specific configurations
+
+# gfortran "Interface mismatch" bug (119928)
+if(CMAKE_Fortran_COMPILER_ID STREQUAL "GNU")
+  if(CMAKE_Fortran_COMPILER_VERSION VERSION_GREATER_EQUAL "15.0"
+     AND CMAKE_Fortran_COMPILER_VERSION VERSION_LESS "15.2")
+    message(FATAL_ERROR
+      "Unsupported GNU Fortran version ${CMAKE_Fortran_COMPILER_VERSION}. "
+      "This release has a known issue (fixed in 15.2). "
+      "Please use GCC >= 15.2 or < 15.0, or a different Fortran compiler.")
+  endif()
+endif()
+
+
 # Set build type as CMake does not provide defaults
 if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
   set(

config/meson.build

@@ -23,6 +23,14 @@ if fc_id == 'gcc'
     '-fbacktrace',
     language: 'fortran',
   )
+
+  # gfortran "Interface mismatch" bug (119928)
+  if fc.version().version_compare('>=15.0') and fc.version().version_compare('<15.2')
+    error('Unsupported GNU Fortran version ' + fc.version() +
+          '. This release has a known issue (fixed in 15.2). ' +
+          'Please use GCC >= 15.2 or < 15.0.')
+  endif
+
 elif fc_id == 'intel'
   add_project_arguments(
     '-fpp',

subprojects/.gitignore

@@ -1 +1,5 @@
 /*/
+.wraplock
+jonquil.wrap
+test-drive.wrap
+toml-f.wrap