[Bug 284486] devel/asmutils: Fails to build with GCC 14: error: implicit declaration of function 'acos' [-Wimplicit-function-declaration]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=284486

            Bug ID: 284486
           Summary: devel/asmutils: Fails to build with GCC 14: error:
                    implicit declaration of function 'acos'
                    [-Wimplicit-function-declaration]
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
               URL: https://pkg-status.freebsd.org/gohan05/data/134i386-de
                    fault-foo/2025-01-24_09h47m13s/logs/asmutils-0.18_10.l
                    og
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: Individual Port(s)
          Assignee: ports-bugs@FreeBSD.org
          Reporter: salvadore@freebsd.org
            Blocks: 281091

The port fails to build with GCC 14, which is about to become GCC_DEFAULT
version. This link can help: https://gcc.gnu.org/gcc-14/porting_to.html

gcc14 -D__CPU__=386 -Wall -O1 -Os -march=i386 -g -o testm-shared testm.c
./libm.so.0
testm.c: In function 'main':
testm.c:68:22: error: implicit declaration of function 'acos'
[-Wimplicit-function-declaration]
   68 |   MATH_ASSERT("acos",acos(1.) , 0.);
      |                      ^~~~
testm.c:52:4: note: in definition of macro 'MATH_ASSERT'
   52 |   (expr >= result-EPS && expr <= result+EPS) ? "ok" :
"fail",(double)expr,(double)result)
      |    ^~~~
testm.c:22:1: note: include '<math.h>' or provide a declaration of 'acos'
   21 | #include <assert.h>
  +++ |+#include <math.h>
   22 | 
testm.c:68:22: warning: incompatible implicit declaration of built-in function
'acos' [-Wbuiltin-declaration-mismatch]
   68 |   MATH_ASSERT("acos",acos(1.) , 0.);
      |                      ^~~~
testm.c:52:4: note: in definition of macro 'MATH_ASSERT'
   52 |   (expr >= result-EPS && expr <= result+EPS) ? "ok" :
"fail",(double)expr,(double)result)
      |    ^~~~
testm.c:68:22: note: include '<math.h>' or provide a declaration of 'acos'
   68 |   MATH_ASSERT("acos",acos(1.) , 0.);
      |                      ^~~~
testm.c:52:4: note: in definition of macro 'MATH_ASSERT'
   52 |   (expr >= result-EPS && expr <= result+EPS) ? "ok" :
"fail",(double)expr,(double)result)
      |    ^~~~
testm.c:72:23: error: implicit declaration of function 'acosh'
[-Wimplicit-function-declaration]
   72 |   MATH_ASSERT("acosh",acosh(1.) , 0.);


Referenced Bugs:

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=281091
[Bug 281091] [exp-run] Update GCC_DEFAULT to 14 etc.
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