patch 7.4.1008
Problem: The OS/2 code pollutes the source while nobody uses it these days.
Solution: Drop the support for OS/2.
diff --git a/src/ex_cmds.c b/src/ex_cmds.c
index 73a5564..f3cb4b4 100644
--- a/src/ex_cmds.c
+++ b/src/ex_cmds.c
@@ -1570,7 +1570,7 @@
char_u *buf;
long_u len;
-#if (defined(UNIX) && !defined(ARCHIE)) || defined(OS2)
+#if defined(UNIX) && !defined(ARCHIE)
int is_fish_shell;
char_u *shell_name = get_isolated_shell_name();
@@ -1590,7 +1590,7 @@
if (buf == NULL)
return NULL;
-#if (defined(UNIX) && !defined(ARCHIE)) || defined(OS2)
+#if defined(UNIX) && !defined(ARCHIE)
/*
* Put braces around the command (for concatenated commands) when
* redirecting input and/or output.