sysutils/memtest86+: remove dependency on gcc48

This is one of three ports still explicitly dependent on lang/gcc48. The
problems that were preventing the upgrade were as follows:

- The __OUT*/__IN* macros in io.h were declaring the produced functions as
  extern, yielding multiple "definitions." They're inline asm, so just give
  them static linkage.

- reboot was declared inline with non-static linkage, thus leaving it in a
  weird state where it wasn't visible within the same CU or another CU.
  Drop the inline for now; if it really needs to be inlined, it can be
  moved into a header and declared `static inline`.

I made these changes, then discovered there's a 5.31b that's still in
testing. I checked the archive for that and was delighted to discover these
changes had already actually been made there, too, so let's consider this a
backport.

PR:		253303
Approved by:	avg (maintainer)
MFH:		2021Q1

1 files changed, 18 insertions, 0 deletions

diff --git a/sysutils/memtest86+/files/patch-lib.c b/sysutils/memtest86+/files/patch-lib.c
new file mode 100644
index 000000000000..dde80182241a
--- /dev/null
+++ b/sysutils/memtest86+/files/patch-lib.c
@@ -0,0 +1,18 @@
+--- lib.c.orig	2021-02-06 17:28:48 UTC
++++ lib.c
+@@ -33,7 +33,7 @@ struct ascii_map_str {
+         int keycode;
+ };
+ 
+-inline void reboot(void)
++void reboot(void)
+ {
+ 	
+ 	/* tell the BIOS to do a cold start */
+@@ -1196,4 +1196,4 @@ void get_list(int x, int y, int len, char *buf)
+ 		   return;
+ 		}
+ 	}
+-}
+\ No newline at end of file
++}