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, 29 insertions, 0 deletions

diff --git a/sysutils/memtest86+/files/patch-io.h b/sysutils/memtest86+/files/patch-io.h
new file mode 100644
index 000000000000..e93567f1867f
--- /dev/null
+++ b/sysutils/memtest86+/files/patch-io.h
@@ -0,0 +1,29 @@
+--- io.h.orig	2013-08-10 02:01:58 UTC
++++ io.h
+@@ -31,7 +31,7 @@
+  */
+ 
+ #define __OUT1(s,x) \
+-extern inline void __out##s(unsigned x value, unsigned short port) {
++static inline void __out##s(unsigned x value, unsigned short port) {
+ 
+ #define __OUT2(s,s1,s2) \
+ __asm__ __volatile__ ("out" #s " %" s1 "0,%" s2 "1"
+@@ -43,7 +43,7 @@ __OUT1(s##_p,x) __OUT2(s,s1,"w") : : "a" (value), "d" 
+ __OUT1(s##c_p,x) __OUT2(s,s1,"") : : "a" (value), "id" (port)); SLOW_DOWN_IO; }
+ 
+ #define __IN1(s) \
+-extern inline RETURN_TYPE __in##s(unsigned short port) { RETURN_TYPE _v;
++static inline RETURN_TYPE __in##s(unsigned short port) { RETURN_TYPE _v;
+ 
+ #define __IN2(s,s1,s2) \
+ __asm__ __volatile__ ("in" #s " %" s2 "1,%" s1 "0"
+@@ -55,7 +55,7 @@ __IN1(s##_p) __IN2(s,s1,"w") : "=a" (_v) : "d" (port) 
+ __IN1(s##c_p) __IN2(s,s1,"") : "=a" (_v) : "id" (port) ,##i ); SLOW_DOWN_IO; return _v; }
+ 
+ #define __OUTS(s) \
+-extern inline void outs##s(unsigned short port, const void * addr, unsigned long count) \
++static inline void outs##s(unsigned short port, const void * addr, unsigned long count) \
+ { __asm__ __volatile__ ("cld ; rep ; outs" #s \
+ : "=S" (addr), "=c" (count) : "d" (port),"0" (addr),"1" (count)); }
+