linux-kernel - [PATCH] Add --sysroot when building dlfilters on cross build environments

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Date:   Mon, 30 Aug 2021 18:12:32 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Adrian Hunter <adrian.hunter@...el.com>
Cc:     Jiri Olsa <jolsa@...nel.org>, Namhyung Kim <namhyung@...nel.org>,
        Ian Rogers <irogers@...gle.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [PATCH] Add --sysroot when building dlfilters on cross build
 environments

Hi Adrian,

	I had to add this cset to fix the build/link on cross build
environments with a sysroot, like Android, EXTRA_CFLAGS is where it will
get the needed --sysroot=/opt/android-ndk-r12b//platforms/android-24/arch-arm, please ack.

- Arnaldo

diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
index 24623599113df215..e04313c4d8409a94 100644
--- a/tools/perf/Makefile.perf
+++ b/tools/perf/Makefile.perf
@@ -785,10 +785,10 @@ endif
 
 $(OUTPUT)dlfilters/%.o: dlfilters/%.c include/perf/perf_dlfilter.h
 	$(Q)$(MKDIR) -p $(OUTPUT)dlfilters
-	$(QUIET_CC)$(CC) -c -Iinclude -o $@ -fpic $<
+	$(QUIET_CC)$(CC) -c -Iinclude $(EXTRA_CFLAGS) -o $@ -fpic $<
 
 $(OUTPUT)dlfilters/%.so: $(OUTPUT)dlfilters/%.o
-	$(QUIET_LINK)$(CC) -shared -o $@ $<
+	$(QUIET_LINK)$(CC) $(EXTRA_CFLAGS) -shared -o $@ $<
 
 ifndef NO_JVMTI
 LIBJVMTI_IN := $(OUTPUT)jvmti/jvmti-in.o