[gcc r13-5250] libfortran: Fix execute_command_line for Windows

[Tobias Burnus <burnus@gcc.gnu.org>]

https://gcc.gnu.org/g:8e2c6e7b426b6c9c13076208b2e176d4aa1432f1

commit r13-5250-g8e2c6e7b426b6c9c13076208b2e176d4aa1432f1
Author: Tobias Burnus <tobias@codesourcery.com>
Date:   Wed Jan 18 23:31:41 2023 +0100

    libfortran: Fix execute_command_line for Windows
    
    On Windows, 'system' is called - that fails with -1 if the command
    interpreter could not be started; on POSIX systems, if the child
    process could not be started by the shell, exit(127)/_exit(127) is
    called/returned. On Windows, cmd.exe (and also the PowerShell) return
    errorlevel 9009.
    
    libgfortran/ChangeLog:
    
            * intrinsics/execute_command_line.c (execute_command_line): On
            Windows, regard system()'s return value of 9009 as EXEC_INVALIDCOMMAND.

Diff:
---
 libgfortran/intrinsics/execute_command_line.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libgfortran/intrinsics/execute_command_line.c b/libgfortran/intrinsics/execute_command_line.c
index 305f067d973..0d1688400c2 100644
--- a/libgfortran/intrinsics/execute_command_line.c
+++ b/libgfortran/intrinsics/execute_command_line.c
@@ -144,6 +144,11 @@ execute_command_line (const char *command, bool wait, int *exitstat,
 #if defined(WEXITSTATUS) && defined(WIFEXITED)
 	       || (WIFEXITED(res) && WEXITSTATUS(res) == 127)
 	       || (WIFEXITED(res) && WEXITSTATUS(res) == 126)
+#endif
+#ifdef __MINGW32__
+		  /* cmd.exe sets the errorlevel to 9009,
+		     if the command could not be executed.  */
+		|| res == 9009
 #endif
 	       )
 	/* Shell return codes 126 and 127 mean that the command line could