Adding upstream version 15.5.upstream/15.5

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 122 insertions, 0 deletions

diff --git a/config/llvm.m4 b/config/llvm.m4
new file mode 100644
index 0000000..21d8cd4
--- /dev/null
+++ b/config/llvm.m4
@@ -0,0 +1,122 @@
+# config/llvm.m4
+
+# PGAC_LLVM_SUPPORT
+# -----------------
+#
+# Look for the LLVM installation, check that it's new enough, set the
+# corresponding LLVM_{CFLAGS,CXXFLAGS,BINPATH} and LDFLAGS
+# variables. Also verify that CLANG is available, to transform C
+# into bitcode.
+#
+AC_DEFUN([PGAC_LLVM_SUPPORT],
+[
+  AC_REQUIRE([AC_PROG_AWK])
+
+  AC_ARG_VAR(LLVM_CONFIG, [path to llvm-config command])
+  PGAC_PATH_PROGS(LLVM_CONFIG, llvm-config llvm-config-7 llvm-config-6.0 llvm-config-5.0 llvm-config-4.0 llvm-config-3.9)
+
+  # no point continuing if llvm wasn't found
+  if test -z "$LLVM_CONFIG"; then
+    AC_MSG_ERROR([llvm-config not found, but required when compiling --with-llvm, specify with LLVM_CONFIG=])
+  fi
+  # check if detected $LLVM_CONFIG is executable
+  pgac_llvm_version="$($LLVM_CONFIG --version 2> /dev/null || echo no)"
+  if test "x$pgac_llvm_version" = "xno"; then
+    AC_MSG_ERROR([$LLVM_CONFIG does not work])
+  fi
+  # and whether the version is supported
+  if echo $pgac_llvm_version | $AWK -F '.' '{ if ([$]1 >= 4 || ([$]1 == 3 && [$]2 >= 9)) exit 1; else exit 0;}';then
+    AC_MSG_ERROR([$LLVM_CONFIG version is $pgac_llvm_version but at least 3.9 is required])
+  fi
+  AC_MSG_NOTICE([using llvm $pgac_llvm_version])
+
+  # need clang to create some bitcode files
+  AC_ARG_VAR(CLANG, [path to clang compiler to generate bitcode])
+  PGAC_PATH_PROGS(CLANG, clang clang-7 clang-6.0 clang-5.0 clang-4.0 clang-3.9)
+  if test -z "$CLANG"; then
+    AC_MSG_ERROR([clang not found, but required when compiling --with-llvm, specify with CLANG=])
+  fi
+  # make sure clang is executable
+  if test "x$($CLANG --version 2> /dev/null || echo no)" = "xno"; then
+    AC_MSG_ERROR([$CLANG does not work])
+  fi
+  # Could check clang version, but it doesn't seem that
+  # important. Systems with a new enough LLVM version are usually
+  # going to have a decent clang version too. It's also not entirely
+  # clear what the minimum version is.
+
+  # Collect compiler flags necessary to build the LLVM dependent
+  # shared library.
+  for pgac_option in `$LLVM_CONFIG --cppflags`; do
+    case $pgac_option in
+      -I*|-D*) LLVM_CPPFLAGS="$pgac_option $LLVM_CPPFLAGS";;
+    esac
+  done
+
+  for pgac_option in `$LLVM_CONFIG --ldflags`; do
+    case $pgac_option in
+      -L*) LDFLAGS="$LDFLAGS $pgac_option";;
+    esac
+  done
+
+  # ABI influencing options, standard influencing options
+  for pgac_option in `$LLVM_CONFIG --cxxflags`; do
+    case $pgac_option in
+      -fno-rtti*) LLVM_CXXFLAGS="$LLVM_CXXFLAGS $pgac_option";;
+      -std=*) LLVM_CXXFLAGS="$LLVM_CXXFLAGS $pgac_option";;
+    esac
+  done
+
+  # Look for components we're interested in, collect necessary
+  # libs. As some components are optional, we can't just list all of
+  # them as it'd raise an error.
+  pgac_components='';
+  for pgac_component in `$LLVM_CONFIG --components`; do
+    case $pgac_component in
+      engine) pgac_components="$pgac_components $pgac_component";;
+      debuginfodwarf) pgac_components="$pgac_components $pgac_component";;
+      orcjit) pgac_components="$pgac_components $pgac_component";;
+      passes) pgac_components="$pgac_components $pgac_component";;
+      native) pgac_components="$pgac_components $pgac_component";;
+      perfjitevents) pgac_components="$pgac_components $pgac_component";;
+    esac
+  done;
+
+  # And then get the libraries that need to be linked in for the
+  # selected components.  They're large libraries, we only want to
+  # link them into the LLVM using shared library.
+  for pgac_option in `$LLVM_CONFIG --libs --system-libs $pgac_components`; do
+    case $pgac_option in
+      -l*) LLVM_LIBS="$LLVM_LIBS $pgac_option";;
+    esac
+  done
+
+  LLVM_BINPATH=`$LLVM_CONFIG --bindir`
+
+dnl LLVM_CONFIG, CLANG are already output via AC_ARG_VAR
+  AC_SUBST(LLVM_LIBS)
+  AC_SUBST(LLVM_CPPFLAGS)
+  AC_SUBST(LLVM_CFLAGS)
+  AC_SUBST(LLVM_CXXFLAGS)
+  AC_SUBST(LLVM_BINPATH)
+
+])# PGAC_LLVM_SUPPORT
+
+
+# PGAC_CHECK_LLVM_FUNCTIONS
+# -------------------------
+#
+# Check presence of some optional LLVM functions.
+# (This shouldn't happen until we're ready to run AC_CHECK_DECLS tests;
+# because PGAC_LLVM_SUPPORT runs very early, it's not an appropriate place.)
+#
+AC_DEFUN([PGAC_CHECK_LLVM_FUNCTIONS],
+[
+  # Check which functionality is present
+  SAVE_CPPFLAGS="$CPPFLAGS"
+  CPPFLAGS="$CPPFLAGS $LLVM_CPPFLAGS"
+  AC_CHECK_DECLS([LLVMOrcGetSymbolAddressIn], [], [], [[#include <llvm-c/OrcBindings.h>]])
+  AC_CHECK_DECLS([LLVMGetHostCPUName, LLVMGetHostCPUFeatures], [], [], [[#include <llvm-c/TargetMachine.h>]])
+  AC_CHECK_DECLS([LLVMCreateGDBRegistrationListener, LLVMCreatePerfJITEventListener], [], [], [[#include <llvm-c/ExecutionEngine.h>]])
+  CPPFLAGS="$SAVE_CPPFLAGS"
+])# PGAC_CHECK_LLVM_FUNCTIONS