libpmc: always generate libpmc_events.c

The jevents build tool will create an empty table if it doesn't find any
events, so we can remove the extra $MACHINE_CPUARCH checks.

Reviewed by:	gnn, ray, emaste
MFC after:	2 weeks
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D30531

Makefile.inc1

@@ -2535,9 +2535,7 @@ _tcsh=bin/csh
 _libmagic=lib/libmagic
 .endif
 
-.if ${MK_PMC} != "no" && \
-    (${TARGET_ARCH} == "aarch64" || ${TARGET_ARCH} == "amd64" || \
-    ${TARGET_ARCH} == "i386")
+.if ${MK_PMC} != "no"
 _jevents=lib/libpmc/pmu-events
 .endif
 

Makefile.libcompat

@@ -51,7 +51,7 @@ _LC_INCDIRS=	\
 .if ${MK_FILE} != "no"
 _libmagic=	lib/libmagic
 .endif
-.if ${MK_PMC} != "no" && ${TARGET_ARCH} == "amd64"
+.if ${MK_PMC} != "no"
 _jevents=	lib/libpmc/pmu-events
 .endif
 

lib/libpmc/Makefile

@@ -8,15 +8,15 @@ INCS=	pmc.h pmclog.h pmcformat.h
 CFLAGS+= -I${SRCTOP}/${RELDIR:H}/libpmcstat
 LDADD+=	-lc++
 
-.if ${MACHINE_CPUARCH} == "aarch64" || ${MACHINE_ARCH} == "amd64" || \
-    ${MACHINE_ARCH} == "i386"
-
 .if ${MACHINE_CPUARCH} == "aarch64"
 EVENT_ARCH="arm64"
 .elif ${MACHINE_ARCH} == "amd64" || ${MACHINE_ARCH} == "i386"
 EVENT_ARCH="x86"
 .elif ${MACHINE_ARCH} == "powerpc"
 EVENT_ARCH="powerpc"
+.else
+# This will generate an empty events table
+EVENT_ARCH="none"
 .endif
 
 .if ${MK_DIRDEPS_BUILD} == "yes"
@@ -40,7 +40,6 @@ libpmc_events.c: ${JEVENTS} .META
 	fi
 CLEANFILES+=	libpmc_events.c libpmc_events.c.tmp
 SRCS+=	libpmc_events.c
-.endif
 
 WARNS?=	3