CustomCommandGenerator: Add support for CROSSCOMPILING_EMULATOR

Teach the `add_custom_command` and `add_custom_target' commands to
substitute argv0 with the crosscompiling emulator if it is a target with
the `CROSSCOMPILING_EMULATOR` property set.

1 files changed, 34 insertions, 0 deletions

diff --git a/Tests/RunCMake/pseudo_emulator_custom_command.c b/Tests/RunCMake/pseudo_emulator_custom_command.c
new file mode 100644
index 0000000..17181c9
--- /dev/null
+++ b/Tests/RunCMake/pseudo_emulator_custom_command.c
@@ -0,0 +1,34 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+// Usage:
+//
+//  /path/to/program arg1 [arg2 [...]]
+//
+// Return EXIT_SUCCESS if 'generated_exe_emulator_expected'
+// string was found in <arg1>.
+// Return EXIT_FAILURE if 'generated_exe_emulator_unexpected'
+// string was found in <arg1>.
+
+int main(int argc, const char* argv[])
+{
+  const char* substring_failure = "generated_exe_emulator_unexpected";
+  const char* substring_success = "generated_exe_emulator_expected";
+  const char* str = argv[1];
+  if (argc < 2)
+    {
+    return EXIT_FAILURE;
+    }
+  if (strstr(str, substring_success) != 0)
+    {
+    return EXIT_SUCCESS;
+    }
+  if (strstr(str, substring_failure) != 0)
+    {
+    return EXIT_FAILURE;
+    }
+  fprintf(stderr, "Failed to find string '%s' in '%s'\n",
+          substring_success, str);
+  return EXIT_FAILURE;
+}