diff -rdcp gmp-5.1.3-orig/configfsf.sub gmp-5.1.3/configfsf.sub
*** gmp-5.1.3/configfsf.sub	2013-09-30 03:18:28.000000000 -0700
--- gmp-5.1.3-fuchsia/configfsf.sub	2016-11-02 14:19:33.480028816 -0700
*************** case $os in
*** 1514,1519 ****
--- 1514,1522 ----
  		;;
  	-nacl*)
  		;;
+ 	-fuchsia*)
+ 		os=-fuchsia
+ 		;;
  	-none)
  		;;
  	*)
diff -rdcp gmp-5.1.3/gmp-h.in gmp-5.1.3-fuchsia/gmp-h.in
*** gmp-5.1.3/gmp-h.in	2013-09-30 03:18:28.000000000 -0700
--- gmp-5.1.3-fuchsia/gmp-h.in	2016-11-02 15:00:44.702141626 -0700
*************** typedef __mpq_struct *mpq_ptr;
*** 264,270 ****
    || defined (_MSL_STDIO_H)           /* Metrowerks */          \
    || defined (_STDIO_H_INCLUDED)      /* QNX4 */		\
    || defined (_ISO_STDIO_ISO_H)       /* Sun C++ */		\
!   || defined (__STDIO_LOADED)         /* VMS */
  #define _GMP_H_HAVE_FILE 1
  #endif
  
--- 264,271 ----
    || defined (_MSL_STDIO_H)           /* Metrowerks */          \
    || defined (_STDIO_H_INCLUDED)      /* QNX4 */		\
    || defined (_ISO_STDIO_ISO_H)       /* Sun C++ */		\
!   || defined (__STDIO_LOADED)         /* VMS */			\
!   || defined (__DEFINED_FILE)         /* musl */
  #define _GMP_H_HAVE_FILE 1
  #endif