[lttng-dev] [PATCH urcu 4/4] Don't force a target and optimization level on ARMv7

Michael Jeanson mjeanson at efficios.com
Tue Dec 15 11:28:50 EST 2020

We shouldn't force a specific target cpu for the compiler on ARMv7 but
let the system or the user choose it. If some of our code depends on a
specific target CPU features, it should be compile tested.

Also remove the default optimisation level of O1, it's potentially a
workaround to an early armv7 compiler performance problem and anyway
most builds will have an optimisation level flag set in the CFLAGS which
will override this one.

Signed-off-by: Michael Jeanson <mjeanson at efficios.com>
Cc: Paul E. McKenney <paulmck at kernel.org>
Change-Id: I1d1bb5cc0fa0be8f8b1d6a9ad7bf063809be1aef
 configure.ac | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/configure.ac b/configure.ac
index daa967a..f477425 100644
--- a/configure.ac
+++ b/configure.ac
@@ -119,10 +119,6 @@ AS_CASE([$host],[*-cygwin*],
-AS_IF([test "$host_cpu" = "armv7l"],[
-	AM_CFLAGS="$AM_CFLAGS -mcpu=cortex-a9 -mtune=cortex-a9 -O1"
 # Search for clock_gettime
 AC_SEARCH_LIBS([clock_gettime], [rt], [

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