Fix #8920 - m4/1.4.19: Runtime assertion windows pops up on MSVC in Debug mode

recipes/m4/all/conandata.yml

@@ -11,6 +11,8 @@ patches:
       base_path: "source_subfolder"
     - patch_file: "patches/1.4.19-0002-ar-lib.patch"
       base_path: "source_subfolder"
+    - patch_file: "patches/1.4.19-0003-msvc-debug-assertion.patch"
+      base_path: "source_subfolder"
   "1.4.18":
     - patch_file: "patches/1.4.18-0001-fflush-adjust-to-glibc-2.28-libio.h-removal.patch"
       base_path: "source_subfolder"

recipes/m4/all/conanfile.py

@@ -27,7 +27,7 @@ def _settings_build(self):
 
     @property
     def _is_msvc(self):
-        return self.settings.compiler == "Visual Studio"
+        return self.settings.compiler == "Visual Studio" or self.settings.compiler == "msvc"
 
     def build_requirements(self):
         if self._settings_build.os == "Windows" and not tools.get_env("CONAN_BASH_PATH"):
@@ -46,7 +46,7 @@ def _configure_autotools(self):
         autotools = AutoToolsBuildEnvironment(self, win_bash=self._settings_build.os == "Windows")
         build_canonical_name = None
         host_canonical_name = None
-        if self.settings.compiler == "Visual Studio":
+        if self._is_msvc:
             # The somewhat older configure script of m4 does not understand the canonical names of Visual Studio
             build_canonical_name = False
             host_canonical_name = False
@@ -62,14 +62,18 @@ def _configure_autotools(self):
         elif self.settings.compiler == "clang":
             if tools.Version(self.version) < "1.4.19":
                 autotools.flags.extend(["-rtlib=compiler-rt", "-Wno-unused-command-line-argument"])
+        if self.settings.os == 'Windows':
+            conf_args.extend(["ac_cv_func__set_invalid_parameter_handler=yes"])
+
         autotools.configure(args=conf_args, configure_dir=self._source_subfolder, build=build_canonical_name, host=host_canonical_name)
         return autotools
 
     @contextmanager
     def _build_context(self):
-        if self.settings.compiler == "Visual Studio":
+        env = {"PATH": [os.path.abspath(self._source_subfolder)]}
+        if self._is_msvc:
             with tools.vcvars(self.settings):
-                env = {
+                env.update({
                     "AR": "{}/build-aux/ar-lib lib".format(tools.unix_path(self._source_subfolder)),
                     "CC": "cl -nologo",
                     "CXX": "cl -nologo",
@@ -78,17 +82,22 @@ def _build_context(self):
                     "OBJDUMP": ":",
                     "RANLIB": ":",
                     "STRIP": ":",
-                }
+                })
                 with tools.environment_append(env):
                     yield
         else:
-            yield
+            with tools.environment_append(env):
+                yield
 
     def _patch_sources(self):
         for patch in self.conan_data.get("patches", {}).get(self.version, []):
             tools.patch(**patch)
 
     def build(self):
+        with tools.chdir(self._source_subfolder):
+            tools.save("help2man", '#!/usr/bin/env bash\n:')
+            if os.name == 'posix':
+                os.chmod("help2man", os.stat("help2man").st_mode | 0o111)
         self._patch_sources()
         with self._build_context():
             autotools = self._configure_autotools()

recipes/m4/all/patches/1.4.19-0003-msvc-debug-assertion.patch

@@ -0,0 +1,31 @@
+diff --git a/src/m4.c b/src/m4.c
+index 2bd57750..ca3ded62 100644
+--- a/src/m4.c
++++ b/src/m4.c
+@@ -36,6 +36,10 @@
+ # include "assert.h"
+ #endif
+
++#ifdef _WIN32
++#  include <crtdbg.h>
++#endif
++
+ /* TRANSLATORS: This is a non-ASCII name: The first name is (with
+    Unicode escapes) "Ren\u00e9" or (with HTML entities) "Ren&eacute;".  */
+ #define AUTHORS proper_name_utf8 ("Rene' Seindal", "Ren\xC3\xA9 Seindal")
+@@ -423,6 +427,15 @@ main (int argc, char *const *argv)
+   textdomain (PACKAGE);
+   atexit (close_stdin);
+
++#ifdef _WIN32
++  _CrtSetReportMode(_CRT_WARN, _CRTDBG_MODE_FILE);
++  _CrtSetReportFile(_CRT_WARN, _CRTDBG_FILE_STDERR);
++  _CrtSetReportMode(_CRT_ERROR, _CRTDBG_MODE_FILE);
++  _CrtSetReportFile(_CRT_ERROR, _CRTDBG_FILE_STDERR);
++  _CrtSetReportMode(_CRT_ASSERT, _CRTDBG_MODE_FILE);
++  _CrtSetReportFile(_CRT_ASSERT, _CRTDBG_FILE_STDERR);
++#endif
++
+   include_init ();
+   debug_init ();
+