6 # Look for the LLVM installation, check that it's new enough, set the
7 # corresponding LLVM_{CFLAGS,CXXFLAGS,BINPATH} and LDFLAGS
8 # variables. Also verify that CLANG is available, to transform C
11 AC_DEFUN([PGAC_LLVM_SUPPORT],
13 AC_REQUIRE([AC_PROG_AWK])
15 AC_ARG_VAR(LLVM_CONFIG, [path to llvm-config command])
16 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)
18 # no point continuing if llvm wasn't found
19 if test -z "$LLVM_CONFIG"; then
20 AC_MSG_ERROR([llvm-config not found, but required when compiling --with-llvm, specify with LLVM_CONFIG=])
22 # check if detected $LLVM_CONFIG is executable
23 pgac_llvm_version="$($LLVM_CONFIG --version 2> /dev/null || echo no)"
24 if test "x$pgac_llvm_version" = "xno"; then
25 AC_MSG_ERROR([$LLVM_CONFIG does not work])
27 # and whether the version is supported
28 if echo $pgac_llvm_version | $AWK -F '.' '{ if ([$]1 >= 4 || ([$]1 == 3 && [$]2 >= 9)) exit 1; else exit 0;}';then
29 AC_MSG_ERROR([$LLVM_CONFIG version is $pgac_llvm_version but at least 3.9 is required])
31 AC_MSG_NOTICE([using llvm $pgac_llvm_version])
33 # need clang to create some bitcode files
34 AC_ARG_VAR(CLANG, [path to clang compiler to generate bitcode])
35 PGAC_PATH_PROGS(CLANG, clang clang-7 clang-6.0 clang-5.0 clang-4.0 clang-3.9)
36 if test -z "$CLANG"; then
37 AC_MSG_ERROR([clang not found, but required when compiling --with-llvm, specify with CLANG=])
39 # make sure clang is executable
40 if test "x$($CLANG --version 2> /dev/null || echo no)" = "xno"; then
41 AC_MSG_ERROR([$CLANG does not work])
43 # Could check clang version, but it doesn't seem that
44 # important. Systems with a new enough LLVM version are usually
45 # going to have a decent clang version too. It's also not entirely
46 # clear what the minimum version is.
48 # Collect compiler flags necessary to build the LLVM dependent
50 for pgac_option in `$LLVM_CONFIG --cppflags`; do
52 -I*|-D*) LLVM_CPPFLAGS="$pgac_option $LLVM_CPPFLAGS";;
56 for pgac_option in `$LLVM_CONFIG --ldflags`; do
58 -L*) LDFLAGS="$LDFLAGS $pgac_option";;
62 # ABI influencing options, standard influencing options
63 for pgac_option in `$LLVM_CONFIG --cxxflags`; do
65 -fno-rtti*) LLVM_CXXFLAGS="$LLVM_CXXFLAGS $pgac_option";;
66 -std=*) LLVM_CXXFLAGS="$LLVM_CXXFLAGS $pgac_option";;
70 # Look for components we're interested in, collect necessary
71 # libs. As some components are optional, we can't just list all of
72 # them as it'd raise an error.
74 for pgac_component in `$LLVM_CONFIG --components`; do
75 case $pgac_component in
76 engine) pgac_components="$pgac_components $pgac_component";;
77 debuginfodwarf) pgac_components="$pgac_components $pgac_component";;
78 orcjit) pgac_components="$pgac_components $pgac_component";;
79 passes) pgac_components="$pgac_components $pgac_component";;
80 native) pgac_components="$pgac_components $pgac_component";;
81 perfjitevents) pgac_components="$pgac_components $pgac_component";;
85 # And then get the libraries that need to be linked in for the
86 # selected components. They're large libraries, we only want to
87 # link them into the LLVM using shared library.
88 for pgac_option in `$LLVM_CONFIG --libs --system-libs $pgac_components`; do
90 -l*) LLVM_LIBS="$LLVM_LIBS $pgac_option";;
94 LLVM_BINPATH=`$LLVM_CONFIG --bindir`
96 dnl LLVM_CONFIG, CLANG are already output via AC_ARG_VAR
98 AC_SUBST(LLVM_CPPFLAGS)
100 AC_SUBST(LLVM_CXXFLAGS)
101 AC_SUBST(LLVM_BINPATH)
103 ])# PGAC_LLVM_SUPPORT
106 # PGAC_CHECK_LLVM_FUNCTIONS
107 # -------------------------
109 # Check presence of some optional LLVM functions.
110 # (This shouldn't happen until we're ready to run AC_CHECK_DECLS tests;
111 # because PGAC_LLVM_SUPPORT runs very early, it's not an appropriate place.)
113 AC_DEFUN([PGAC_CHECK_LLVM_FUNCTIONS],
115 # Check which functionality is present
116 SAVE_CPPFLAGS="$CPPFLAGS"
117 CPPFLAGS="$CPPFLAGS $LLVM_CPPFLAGS"
118 AC_CHECK_DECLS([LLVMOrcGetSymbolAddressIn], [], [], [[#include <llvm-c/OrcBindings.h>]])
119 AC_CHECK_DECLS([LLVMGetHostCPUName, LLVMGetHostCPUFeatures], [], [], [[#include <llvm-c/TargetMachine.h>]])
120 AC_CHECK_DECLS([LLVMCreateGDBRegistrationListener, LLVMCreatePerfJITEventListener], [], [], [[#include <llvm-c/ExecutionEngine.h>]])
121 CPPFLAGS="$SAVE_CPPFLAGS"
122 ])# PGAC_CHECK_LLVM_FUNCTIONS