From bc78182309b90bde2b96fc3296c5b24825520f26 Mon Sep 17 00:00:00 2001 From: Asaf Kahlon Date: Mon, 7 May 2018 23:26:23 +0300 Subject: [PATCH] zeromq: check if -latomic is needed Fixes: http://autobuild.buildroot.net/results/b149aa2ee00e4d6a53c884cf99ecb2dd8af58b65/ http://autobuild.buildroot.net/results/e4b3616ac2695d3b6898185a70da6509b1faa2b8/ Patch the package to check if -latomic is needed to be added, depending on the result of AC_LINK_IFELSE. The patch was sent to upstream, see: https://github.com/zeromq/libzmq/pull/3083 Signed-off-by: Asaf Kahlon Signed-off-by: Thomas Petazzoni --- ...nclude.m4-check-if-latomic-is-needed.patch | 70 +++++++++++++++++++ 1 file changed, 70 insertions(+) create mode 100644 package/zeromq/0002-acinclude.m4-check-if-latomic-is-needed.patch diff --git a/package/zeromq/0002-acinclude.m4-check-if-latomic-is-needed.patch b/package/zeromq/0002-acinclude.m4-check-if-latomic-is-needed.patch new file mode 100644 index 0000000000..a0c188a5c3 --- /dev/null +++ b/package/zeromq/0002-acinclude.m4-check-if-latomic-is-needed.patch @@ -0,0 +1,70 @@ +From 9f4ca582555b208d065f730b5ce3b1901136b275 Mon Sep 17 00:00:00 2001 +From: Asaf Kahlon +Date: Mon, 7 May 2018 23:19:09 +0300 +Subject: [PATCH] acinclude.m4: check if -latomic is needed + +On some cases, -latomic is needed for linking, and since the current +acinclude.m4 checks only compilation we can sometimes miss the need for -latomic +and the linking process will fail. +Therefore, the AC_CHECK_IFELSE was replaced with AC_LINK_IFELSE. If the first +try fails, we try to link again with -latomic and add LIBS="-latomic" in case we +succeeded. + +Signed-off-by: Asaf Kahlon +--- + acinclude.m4 | 32 ++++++++++++++++++++++++++++---- + 1 file changed, 28 insertions(+), 4 deletions(-) + +diff --git a/acinclude.m4 b/acinclude.m4 +index f648ed0f..aa35195f 100644 +--- a/acinclude.m4 ++++ b/acinclude.m4 +@@ -668,7 +668,7 @@ dnl # Check if compiler supoorts __atomic_Xxx intrinsics + dnl ################################################################################ + AC_DEFUN([LIBZMQ_CHECK_ATOMIC_INTRINSICS], [{ + AC_MSG_CHECKING(whether compiler supports __atomic_Xxx intrinsics) +- AC_COMPILE_IFELSE([AC_LANG_SOURCE([ ++ AC_LINK_IFELSE([AC_LANG_SOURCE([ + /* atomic intrinsics test */ + int v = 0; + int main (int, char **) +@@ -677,9 +677,33 @@ int main (int, char **) + return t; + } + ])], +- [AC_MSG_RESULT(yes) ; libzmq_cv_has_atomic_instrisics="yes" ; $1], +- [AC_MSG_RESULT(no) ; libzmq_cv_has_atomic_instrisics="no" ; $2] +- ) ++ [libzmq_cv_has_atomic_instrisics="yes"], ++ [libzmq_cv_has_atomic_instrisics="no"]) ++ ++ if test "x$libzmq_cv_has_atomic_instrisics" = "xno"; then ++ save_LDFLAGS=$LDFLAGS ++ LDFLAGS="$LDFLAGS -latomic" ++ AC_LINK_IFELSE([AC_LANG_SOURCE([ ++ /* atomic intrinsics test */ ++ int v = 0; ++ int main (int, char **) ++ { ++ int t = __atomic_add_fetch (&v, 1, __ATOMIC_ACQ_REL); ++ return t; ++ } ++ ])], ++ [libzmq_cv_has_atomic_instrisics="yes" LIBS="-latomic"], ++ [libzmq_cv_has_atomic_instrisics="no"]) ++ LDFLAGS=$save_LDFLAGS ++ fi ++ ++ if test "x$libzmq_cv_has_atomic_instrisics" = "xyes"; then ++ AC_MSG_RESULT(yes) ++ $1 ++ else ++ AC_MSG_RESULT(no) ++ $2 ++ fi + }]) + + dnl ################################################################################ +-- +2.17.0 + -- 2.30.2