adds -latomic to. ghc-prim

Reviewers: bgamari, hvr

Reviewed By: bgamari

Subscribers: erikd, hvr, rwbarton, thomie, carter

Differential Revision: https://phabricator.haskell.org/D4378

6 files changed, 38 insertions, 24 deletions

diff --git a/aclocal.m4 b/aclocal.m4
index 2ed2c08327..6f37972c08 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -1281,24 +1281,6 @@ AC_SUBST(GccIsClang)
 rm -f conftest.txt
 ])
 
-# FP_GCC_SUPPORTS__ATOMICS
-# ------------------------
-# Does gcc support the __atomic_* family of builtins?
-AC_DEFUN([FP_GCC_SUPPORTS__ATOMICS],
-[
-   AC_REQUIRE([AC_PROG_CC])
-   AC_MSG_CHECKING([whether GCC supports __atomic_ builtins])
-   echo 'int test(int *x) { int y; __atomic_load(&x, &y, __ATOMIC_SEQ_CST); return x; }' > conftest.c
-   if $CC -c conftest.c > /dev/null 2>&1; then
-       CONF_GCC_SUPPORTS__ATOMICS=YES
-       AC_MSG_RESULT([yes])
-   else
-       CONF_GCC_SUPPORTS__ATOMICS=NO
-       AC_MSG_RESULT([no])
-   fi
-   rm -f conftest.c conftest.o
-])
-
 # FP_GCC_SUPPORTS_NO_PIE
 # ----------------------
 # Does gcc support the -no-pie option? If so we should pass it to gcc when
diff --git a/configure.ac b/configure.ac
index 5bf096b3d0..216a97fb49 100644
--- a/configure.ac
+++ b/configure.ac
@@ -712,11 +712,6 @@ FP_GCC_VERSION
 dnl ** See whether gcc supports -no-pie
 FP_GCC_SUPPORTS_NO_PIE
 
-dnl ** Used to determine how to compile ghc-prim's atomics.c, used by
-dnl    unregisterised, Sparc, and PPC backends.
-FP_GCC_SUPPORTS__ATOMICS
-AC_DEFINE([HAVE_C11_ATOMICS], [$CONF_GCC_SUPPORTS__ATOMICS], [Does GCC support __atomic primitives?])
-
 FP_GCC_EXTRA_FLAGS
 
 dnl ** look to see if we have a C compiler using an llvm back end.
diff --git a/libraries/ghc-prim/Setup.hs b/libraries/ghc-prim/Setup.hs
index 5bb17e2392..cccc416d78 100644
--- a/libraries/ghc-prim/Setup.hs
+++ b/libraries/ghc-prim/Setup.hs
@@ -18,7 +18,7 @@ import System.Exit
 import System.Directory
 
 main :: IO ()
-main = do let hooks = simpleUserHooks {
+main = do let hooks = autoconfUserHooks {
                   regHook = addPrimModule
                           $ regHook simpleUserHooks,
                   buildHook = build_primitive_sources
diff --git a/libraries/ghc-prim/aclocal.m4 b/libraries/ghc-prim/aclocal.m4
new file mode 100644
index 0000000000..e5695385f2
--- /dev/null
+++ b/libraries/ghc-prim/aclocal.m4
@@ -0,0 +1,17 @@
+# FP_GCC_SUPPORTS__ATOMICS
+# ------------------------
+# Does gcc support the __atomic_* family of builtins?
+AC_DEFUN([FP_GCC_SUPPORTS__ATOMICS],
+[
+   AC_REQUIRE([AC_PROG_CC])
+   AC_MSG_CHECKING([whether GCC supports __atomic_ builtins])
+   echo 'int test(int *x) { int y; __atomic_load(&x, &y, __ATOMIC_SEQ_CST); return x; }' > conftest.c
+   if $CC -c conftest.c > /dev/null 2>&1; then
+       CONF_GCC_SUPPORTS__ATOMICS=YES
+       AC_MSG_RESULT([yes])
+   else
+       CONF_GCC_SUPPORTS__ATOMICS=NO
+       AC_MSG_RESULT([no])
+   fi
+   rm -f conftest.c conftest.o
+])
diff --git a/libraries/ghc-prim/configure.ac b/libraries/ghc-prim/configure.ac
new file mode 100644
index 0000000000..bacc89ccc8
--- /dev/null
+++ b/libraries/ghc-prim/configure.ac
@@ -0,0 +1,18 @@
+AC_INIT([ghc-prim package], [2.1], [glasgow-haskell-bugs@haskell.org], [ghc-prim])
+
+AC_CONFIG_SRCDIR([ghc-prim.cabal])
+
+# -------------------------------------------------------------------------
+dnl ** Used to determine how to compile ghc-prim's atomics.c, used by
+dnl    unregisterised, Sparc, and PPC backends.
+FP_GCC_SUPPORTS__ATOMICS
+AC_DEFINE([HAVE_C11_ATOMICS], [$CONF_GCC_SUPPORTS__ATOMICS], [Does GCC support __atomic primitives?])
+
+if test "x$CONF_GCC_SUPPORTS__ATOMICS" = YES
+then PRIM_CFLAGS=-DHAVE_C11_ATOMICS
+     PRIM_EXTRA_LIBRARIES=atomic
+fi
+AC_SUBST([PRIM_CFLAGS])
+AC_SUBST([PRIM_EXTRA_LIBRARIES])
+AC_CONFIG_FILES([ghc-prim.buildinfo])
+AC_OUTPUT
diff --git a/libraries/ghc-prim/ghc-prim.buildinfo.in b/libraries/ghc-prim/ghc-prim.buildinfo.in
new file mode 100644
index 0000000000..a0932824c5
--- /dev/null
+++ b/libraries/ghc-prim/ghc-prim.buildinfo.in
@@ -0,0 +1,2 @@
+cc-options: @PRIM_CFLAGS@
+extra-libraries: @PRIM_EXTRA_LIBRARIES@
\ No newline at end of file