there is no ucontext on ppc64 in rawhide, only ucontext_t

gperftools-2.6.1-ppc64-ucontext-fix.patch

@@ -0,0 +1,13 @@
+diff -up gperftools-2.6.1/src/stacktrace_powerpc-linux-inl.h.ucontextfix gperftools-2.6.1/src/stacktrace_powerpc-linux-inl.h
+--- gperftools-2.6.1/src/stacktrace_powerpc-linux-inl.h.ucontextfix	2017-07-17 15:57:42.066001611 -0400
++++ gperftools-2.6.1/src/stacktrace_powerpc-linux-inl.h	2017-07-17 15:58:04.610427563 -0400
+@@ -53,7 +53,8 @@
+ #elif defined(HAVE_UCONTEXT_H)
+ #include <ucontext.h>  // for ucontext_t
+ #endif
+-typedef ucontext ucontext_t;
++// no ucontext typedef on ppc64
++// typedef ucontext ucontext_t;
+ 
+ // PowerPC64 Little Endian follows BE wrt. backchain, condition register,
+ // and LR save area, so no need to adjust the reading struct.

gperftools.spec

@@ -10,6 +10,8 @@ Group:		Development/Tools
 Summary:	Very fast malloc and performance analysis tools
 URL:		https://github.com/gperftools/gperftools
 Source0:	https://github.com/gperftools/gperftools/releases/download/%{name}-%{version}/%{name}-%{version}.tar.gz
+# There is no ucontext typedef on ppc64, at least not in rawhide.
+Patch0:		gperftools-2.6.1-ppc64-ucontext-fix.patch
 ExcludeArch:	s390
 
 %ifnarch s390x
@@ -58,6 +60,7 @@ Pprof is a heap and CPU profiler tool, part of the gperftools suite.
 
 %prep
 %setup -q
+%patch0 -p1 -b .ucontextfix
 
 # Fix end-of-line encoding
 sed -i 's/\r//' README_windows.txt