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 verify that CLANG is available, to transform C 9# into bitcode. 10# 11AC_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-7 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 $pgac_llvm_version but at least 3.9 is required]) 30 fi 31 32 # need clang to create some bitcode files 33 AC_ARG_VAR(CLANG, [path to clang compiler to generate bitcode]) 34 PGAC_PATH_PROGS(CLANG, clang clang-7 clang-6.0 clang-5.0 clang-4.0 clang-3.9) 35 if test -z "$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 $pgac_component";; 79 native) pgac_components="$pgac_components $pgac_component";; 80 perfjitevents) pgac_components="$pgac_components $pgac_component";; 81 esac 82 done; 83 84 # And then get the libraries that need to be linked in for the 85 # selected components. They're large libraries, we only want to 86 # link them into the LLVM using shared library. 87 for pgac_option in `$LLVM_CONFIG --libs --system-libs $pgac_components`; do 88 case $pgac_option in 89 -l*) LLVM_LIBS="$LLVM_LIBS $pgac_option";; 90 esac 91 done 92 93 LLVM_BINPATH=`$LLVM_CONFIG --bindir` 94 95dnl LLVM_CONFIG, CLANG are already output via AC_ARG_VAR 96 AC_SUBST(LLVM_LIBS) 97 AC_SUBST(LLVM_CPPFLAGS) 98 AC_SUBST(LLVM_CFLAGS) 99 AC_SUBST(LLVM_CXXFLAGS) 100 AC_SUBST(LLVM_BINPATH) 101 102])# PGAC_LLVM_SUPPORT 103 104 105# PGAC_CHECK_LLVM_FUNCTIONS 106# ------------------------- 107# 108# Check presence of some optional LLVM functions. 109# (This shouldn't happen until we're ready to run AC_CHECK_DECLS tests; 110# because PGAC_LLVM_SUPPORT runs very early, it's not an appropriate place.) 111# 112AC_DEFUN([PGAC_CHECK_LLVM_FUNCTIONS], 113[ 114 # Check which functionality is present 115 SAVE_CPPFLAGS="$CPPFLAGS" 116 CPPFLAGS="$CPPFLAGS $LLVM_CPPFLAGS" 117 AC_CHECK_DECLS([LLVMOrcGetSymbolAddressIn], [], [], [[#include <llvm-c/OrcBindings.h>]]) 118 AC_CHECK_DECLS([LLVMGetHostCPUName, LLVMGetHostCPUFeatures], [], [], [[#include <llvm-c/TargetMachine.h>]]) 119 AC_CHECK_DECLS([LLVMCreateGDBRegistrationListener, LLVMCreatePerfJITEventListener], [], [], [[#include <llvm-c/ExecutionEngine.h>]]) 120 CPPFLAGS="$SAVE_CPPFLAGS" 121])# PGAC_CHECK_LLVM_FUNCTIONS 122