|
| 1 | +# config/llvm.m4 |
| 2 | + |
| 3 | +# PGAC_LLVM_SUPPORT |
| 4 | +# --------------- |
| 5 | +# |
| 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 verifies that CLANG is available, to transform C |
| 9 | +# into bitcode. |
| 10 | +# |
| 11 | +AC_DEFUN([PGAC_LLVM_SUPPORT], |
| 12 | +[ |
| 13 | +AC_REQUIRE([AC_PROG_AWK]) |
| 14 | +
|
| 15 | +AC_ARG_VAR(LLVM_CONFIG,[path to llvm-config command]) |
| 16 | + PGAC_PATH_PROGS(LLVM_CONFIG, llvm-config llvm-config-6.0 llvm-config-5.0 llvm-config-4.0 llvm-config-3.9) |
| 17 | +
|
| 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=]) |
| 21 | + fi |
| 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]) |
| 26 | + fi |
| 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 $pgac_llvm_version but at least 3.9 is required]) |
| 30 | + fi |
| 31 | +
|
| 32 | + # need clang to create some bitcode files |
| 33 | +AC_ARG_VAR(CLANG,[path to clang compiler to generate bitcode]) |
| 34 | + PGAC_PATH_PROGS(CLANG, clang clang-6.0 clang-5.0 clang-4.0 clang-3.9) |
| 35 | + if test -z "$CLANG"; then |
| 36 | +AC_MSG_ERROR([clang not found, but required when compiling --with-llvm, specify with CLANG=]) |
| 37 | + fi |
| 38 | + # make sure clang is executable |
| 39 | + if test "x$($CLANG --version 2> /dev/null || echo no)" = "xno"; then |
| 40 | +AC_MSG_ERROR([$CLANG does not work]) |
| 41 | + fi |
| 42 | + # Could check clang version, but it doesn't seem that |
| 43 | + # important. Systems with a new enough LLVM version are usually |
| 44 | + # going to have a decent clang version too. It's also not entirely |
| 45 | + # clear what the minimum version is. |
| 46 | +
|
| 47 | + # Collect compiler flags necessary to build the LLVM dependent |
| 48 | + # shared library. |
| 49 | + for pgac_option in `$LLVM_CONFIG --cppflags`; do |
| 50 | + case $pgac_option in |
| 51 | + -I*|-D*) LLVM_CPPFLAGS="$pgac_option $LLVM_CPPFLAGS";; |
| 52 | + esac |
| 53 | + done |
| 54 | +
|
| 55 | + for pgac_option in `$LLVM_CONFIG --ldflags`; do |
| 56 | + case $pgac_option in |
| 57 | + -L*) LDFLAGS="$LDFLAGS $pgac_option";; |
| 58 | + esac |
| 59 | + done |
| 60 | +
|
| 61 | + # ABI influencing options, standard influencing options |
| 62 | + for pgac_option in `$LLVM_CONFIG --cxxflags`; do |
| 63 | + case $pgac_option in |
| 64 | + -fno-rtti*) LLVM_CXXFLAGS="$LLVM_CXXFLAGS $pgac_option";; |
| 65 | + -std=*) LLVM_CXXFLAGS="$LLVM_CXXFLAGS $pgac_option";; |
| 66 | + esac |
| 67 | + done |
| 68 | +
|
| 69 | + # Look for components we're interested in, collect necessary |
| 70 | + # libs. As some components are optional, we can't just list all of |
| 71 | + # them as it'd raise an error. |
| 72 | + pgac_components=''; |
| 73 | + for pgac_component in `$LLVM_CONFIG --components`; do |
| 74 | + case $pgac_component in |
| 75 | + engine) pgac_components="$pgac_components $pgac_component";; |
| 76 | + debuginfodwarf) pgac_components="$pgac_components $pgac_component";; |
| 77 | + orcjit) pgac_components="$pgac_components $pgac_component";; |
| 78 | + passes) pgac_components="$pgac_components $pgac_component";; |
| 79 | + perfjitevents) pgac_components="$pgac_components $pgac_component";; |
| 80 | + esac |
| 81 | + done; |
| 82 | +
|
| 83 | + # And then get the libraries that need to be linked in for the |
| 84 | + # selected components. They're large libraries, we only want to |
| 85 | + # link them into the LLVM using shared library. |
| 86 | + for pgac_option in `$LLVM_CONFIG --libs --system-libs $pgac_components`; do |
| 87 | + case $pgac_option in |
| 88 | + -l*) LLVM_LIBS="$LLVM_LIBS $pgac_option";; |
| 89 | + esac |
| 90 | + done |
| 91 | +
|
| 92 | + LLVM_BINPATH=`$LLVM_CONFIG --bindir` |
| 93 | +
|
| 94 | + # Check which functionality is present |
| 95 | + SAVE_CPPFLAGS="$CPPFLAGS" |
| 96 | + CPPFLAGS="$CPPFLAGS $LLVM_CPPFLAGS" |
| 97 | +AC_CHECK_DECLS([LLVMOrcGetSymbolAddressIn, LLVMOrcRegisterGDB, LLVMOrcRegisterPerf],[],[],[[#include <llvm-c/OrcBindings.h>]]) |
| 98 | +AC_CHECK_DECLS([LLVMGetHostCPUName],[],[],[[#include <llvm-c/TargetMachine.h>]]) |
| 99 | + CPPFLAGS="$SAVE_CPPFLAGS" |
| 100 | +
|
| 101 | + # LLVM_CONFIG, CLANG are already output via AC_ARG_VAR |
| 102 | +AC_SUBST(LLVM_LIBS) |
| 103 | +AC_SUBST(LLVM_CPPFLAGS) |
| 104 | +AC_SUBST(LLVM_CFLAGS) |
| 105 | +AC_SUBST(LLVM_CXXFLAGS) |
| 106 | +AC_SUBST(LLVM_BINPATH) |
| 107 | +
|
| 108 | +])# PGAC_LLVM_SUPPORT |