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#!/bin/bash
#
# Copyright 2013-2020 Lawrence Livermore National Security, LLC and other
# Spack Project Developers. See the top-level COPYRIGHT file for details.
#
# SPDX-License-Identifier: (Apache-2.0 OR MIT)
#
# Spack compiler wrapper script.
#
# Compiler commands go through this compiler wrapper in Spack builds.
# The compiler wrapper is a thin layer around the standard compilers.
# It enables several key pieces of functionality:
#
# 1. It allows Spack to swap compilers into and out of builds easily.
# 2. It adds several options to the compile line so that spack
# packages can find their dependencies at build time and run time:
# -I and/or -isystem arguments for dependency /include directories.
# -L arguments for dependency /lib directories.
# -Wl,-rpath arguments for dependency /lib directories.
#
# This is an array of environment variables that need to be set before
# the script runs. They are set by routines in spack.build_environment
# as part of spack.package.Package.do_install().
parameters=(
SPACK_ENV_PATH
SPACK_DEBUG_LOG_DIR
SPACK_DEBUG_LOG_ID
SPACK_COMPILER_SPEC
SPACK_CC_RPATH_ARG
SPACK_CXX_RPATH_ARG
SPACK_F77_RPATH_ARG
SPACK_FC_RPATH_ARG
SPACK_TARGET_ARGS
SPACK_DTAGS_TO_ADD
SPACK_DTAGS_TO_STRIP
SPACK_LINKER_ARG
SPACK_SHORT_SPEC
SPACK_SYSTEM_DIRS
)
# The compiler input variables are checked for sanity later:
# SPACK_CC, SPACK_CXX, SPACK_F77, SPACK_FC
# The default compiler flags are passed from these variables:
# SPACK_CFLAGS, SPACK_CXXFLAGS, SPACK_FFLAGS,
# SPACK_LDFLAGS, SPACK_LDLIBS
# Debug env var is optional; set to "TRUE" for debug logging:
# SPACK_DEBUG
# Test command is used to unit test the compiler script.
# SPACK_TEST_COMMAND
# die()
# Prints a message and exits with error 1.
function die {
echo "$@"
exit 1
}
# read input parameters into proper bash arrays.
# SYSTEM_DIRS is delimited by :
IFS=':' read -ra SPACK_SYSTEM_DIRS <<< "${SPACK_SYSTEM_DIRS}"
# SPACK_<LANG>FLAGS and SPACK_LDLIBS are split by ' '
IFS=' ' read -ra SPACK_FFLAGS <<< "$SPACK_FFLAGS"
IFS=' ' read -ra SPACK_CPPFLAGS <<< "$SPACK_CPPFLAGS"
IFS=' ' read -ra SPACK_CFLAGS <<< "$SPACK_CFLAGS"
IFS=' ' read -ra SPACK_CXXFLAGS <<< "$SPACK_CXXFLAGS"
IFS=' ' read -ra SPACK_LDFLAGS <<< "$SPACK_LDFLAGS"
IFS=' ' read -ra SPACK_LDLIBS <<< "$SPACK_LDLIBS"
# test whether a path is a system directory
function system_dir {
path="$1"
for sd in "${SPACK_SYSTEM_DIRS[@]}"; do
if [ "${path}" == "${sd}" ] || [ "${path}" == "${sd}/" ]; then
# success if path starts with a system prefix
return 0
fi
done
return 1 # fail if path starts no system prefix
}
for param in "${parameters[@]}"; do
if [[ -z ${!param+x} ]]; then
die "Spack compiler must be run from Spack! Input '$param' is missing."
fi
done
# Figure out the type of compiler, the language, and the mode so that
# the compiler script knows what to do.
#
# Possible languages are C, C++, Fortran 77, and Fortran 90.
# 'command' is set based on the input command to $SPACK_[CC|CXX|F77|F90]
#
# 'mode' is set to one of:
# vcheck version check
# cpp preprocess
# cc compile
# as assemble
# ld link
# ccld compile & link
command=$(basename "$0")
comp="CC"
case "$command" in
cpp)
mode=cpp
;;
cc|c89|c99|gcc|clang|armclang|icc|pgcc|nvc|xlc|xlc_r|fcc)
command="$SPACK_CC"
language="C"
comp="CC"
lang_flags=C
;;
c++|CC|g++|clang++|armclang++|icpc|pgc++|nvc++|xlc++|xlc++_r|FCC)
command="$SPACK_CXX"
language="C++"
comp="CXX"
lang_flags=CXX
;;
ftn|f90|fc|f95|gfortran|flang|armflang|ifort|pgfortran|nvfortran|xlf90|xlf90_r|nagfor|frt)
command="$SPACK_FC"
language="Fortran 90"
comp="FC"
lang_flags=F
;;
f77|xlf|xlf_r|pgf77|frt)
command="$SPACK_F77"
language="Fortran 77"
comp="F77"
lang_flags=F
;;
ld)
mode=ld
;;
*)
die "Unknown compiler: $command"
;;
esac
# If any of the arguments below are present, then the mode is vcheck.
# In vcheck mode, nothing is added in terms of extra search paths or
# libraries.
if [[ -z $mode ]] || [[ $mode == ld ]]; then
for arg in "$@"; do
case $arg in
-v|-V|--version|-dumpversion)
mode=vcheck
break
;;
esac
done
fi
# Finish setting up the mode.
if [[ -z $mode ]]; then
mode=ccld
for arg in "$@"; do
if [[ $arg == -E ]]; then
mode=cpp
break
elif [[ $arg == -S ]]; then
mode=as
break
elif [[ $arg == -c ]]; then
mode=cc
break
fi
done
fi
# This is needed to ensure we set RPATH instead of RUNPATH
# (or the opposite, depending on the configuration in config.yaml)
#
# Documentation on this mechanism is lacking at best. A few sources
# of information are (note that some of them take explicitly the
# opposite stance that Spack does):
#
# http://blog.qt.io/blog/2011/10/28/rpath-and-runpath/
# https://wiki.debian.org/RpathIssue
#
# The only discussion I could find on enabling new dynamic tags by
# default on ld is the following:
#
# https://sourceware.org/ml/binutils/2013-01/msg00307.html
#
dtags_to_add="${SPACK_DTAGS_TO_ADD}"
dtags_to_strip="${SPACK_DTAGS_TO_STRIP}"
linker_arg="${SPACK_LINKER_ARG}"
# Set up rpath variable according to language.
eval rpath=\$SPACK_${comp}_RPATH_ARG
# Dump the mode and exit if the command is dump-mode.
if [[ $SPACK_TEST_COMMAND == dump-mode ]]; then
echo "$mode"
exit
fi
# Check that at least one of the real commands was actually selected,
# otherwise we don't know what to execute.
if [[ -z $command ]]; then
die "ERROR: Compiler '$SPACK_COMPILER_SPEC' does not support compiling $language programs."
fi
#
# Filter '.' and Spack environment directories out of PATH so that
# this script doesn't just call itself
#
IFS=':' read -ra env_path <<< "$PATH"
IFS=':' read -ra spack_env_dirs <<< "$SPACK_ENV_PATH"
spack_env_dirs+=("" ".")
export PATH=""
for dir in "${env_path[@]}"; do
addpath=true
for env_dir in "${spack_env_dirs[@]}"; do
if [[ "$dir" == "$env_dir" ]]; then
addpath=false
break
fi
done
if $addpath; then
export PATH="${PATH:+$PATH:}$dir"
fi
done
if [[ $mode == vcheck ]]; then
exec "${command}" "$@"
fi
# Darwin's linker has a -r argument that merges object files together.
# It doesn't work with -rpath.
# This variable controls whether they are added.
add_rpaths=true
if [[ ($mode == ld || $mode == ccld) && "$SPACK_SHORT_SPEC" =~ "darwin" ]];
then
for arg in "$@"; do
if [[ ($arg == -r && $mode == ld) ||
($arg == -r && $mode == ccld) ||
($arg == -Wl,-r && $mode == ccld) ]]; then
add_rpaths=false
break
fi
done
fi
# Save original command for debug logging
input_command="$*"
#
# Parse the command line arguments.
#
# We extract -L, -I, -isystem and -Wl,-rpath arguments from the
# command line and recombine them with Spack arguments later. We
# parse these out so that we can make sure that system paths come
# last, that package arguments come first, and that Spack arguments
# are injected properly.
#
# All other arguments, including -l arguments, are treated as
# 'other_args' and left in their original order. This ensures that
# --start-group, --end-group, and other order-sensitive flags continue to
# work as the caller expects.
#
# The libs variable is initialized here for completeness, and it is also
# used later to inject flags supplied via `ldlibs` on the command
# line. These come into the wrappers via SPACK_LDLIBS.
#
includes=()
libdirs=()
rpaths=()
system_includes=()
system_libdirs=()
system_rpaths=()
libs=()
other_args=()
isystem_system_includes=()
isystem_includes=()
while [ -n "$1" ]; do
# an RPATH to be added after the case statement.
rp=""
case "$1" in
-isystem*)
arg="${1#-isystem}"
isystem_was_used=true
if [ -z "$arg" ]; then shift; arg="$1"; fi
if system_dir "$arg"; then
isystem_system_includes+=("$arg")
else
isystem_includes+=("$arg")
fi
;;
-I*)
arg="${1#-I}"
if [ -z "$arg" ]; then shift; arg="$1"; fi
if system_dir "$arg"; then
system_includes+=("$arg")
else
includes+=("$arg")
fi
;;
-L*)
arg="${1#-L}"
if [ -z "$arg" ]; then shift; arg="$1"; fi
if system_dir "$arg"; then
system_libdirs+=("$arg")
else
libdirs+=("$arg")
fi
;;
-l*)
arg="${1#-l}"
if [ -z "$arg" ]; then shift; arg="$1"; fi
other_args+=("-l$arg")
;;
-Wl,*)
arg="${1#-Wl,}"
if [ -z "$arg" ]; then shift; arg="$1"; fi
if [[ "$arg" = -rpath=* ]]; then
rp="${arg#-rpath=}"
elif [[ "$arg" = -rpath,* ]]; then
rp="${arg#-rpath,}"
elif [[ "$arg" = -rpath ]]; then
shift; arg="$1"
if [[ "$arg" != -Wl,* ]]; then
die "-Wl,-rpath was not followed by -Wl,*"
fi
rp="${arg#-Wl,}"
elif [[ "$arg" = "$dtags_to_strip" ]] ; then
: # We want to remove explicitly this flag
else
other_args+=("-Wl,$arg")
fi
;;
-Xlinker,*)
arg="${1#-Xlinker,}"
if [ -z "$arg" ]; then shift; arg="$1"; fi
if [[ "$arg" = -rpath=* ]]; then
rp="${arg#-rpath=}"
elif [[ "$arg" = -rpath ]]; then
shift; arg="$1"
if [[ "$arg" != -Xlinker,* ]]; then
die "-Xlinker,-rpath was not followed by -Xlinker,*"
fi
rp="${arg#-Xlinker,}"
else
other_args+=("-Xlinker,$arg")
fi
;;
-Xlinker)
if [[ "$2" == "-rpath" ]]; then
if [[ "$3" != "-Xlinker" ]]; then
die "-Xlinker,-rpath was not followed by -Xlinker,*"
fi
shift 3;
rp="$1"
elif [[ "$2" = "$dtags_to_strip" ]] ; then
shift # We want to remove explicitly this flag
else
other_args+=("$1")
fi
;;
*)
if [[ "$1" = "$dtags_to_strip" ]] ; then
: # We want to remove explicitly this flag
else
other_args+=("$1")
fi
;;
esac
# test rpaths against system directories in one place.
if [ -n "$rp" ]; then
if system_dir "$rp"; then
system_rpaths+=("$rp")
else
rpaths+=("$rp")
fi
fi
shift
done
#
# Add flags from Spack's cppflags, cflags, cxxflags, fcflags, fflags, and
# ldflags. We stick to the order that gmake puts the flags in by default.
#
# See the gmake manual on implicit rules for details:
# https://www.gnu.org/software/make/manual/html_node/Implicit-Variables.html
#
flags=()
# Fortran flags come before CPPFLAGS
case "$mode" in
cc|ccld)
case $lang_flags in
F)
flags=("${flags[@]}" "${SPACK_FFLAGS[@]}") ;;
esac
;;
esac
# C preprocessor flags come before any C/CXX flags
case "$mode" in
cpp|as|cc|ccld)
flags=("${flags[@]}" "${SPACK_CPPFLAGS[@]}") ;;
esac
# Add C and C++ flags
case "$mode" in
cc|ccld)
case $lang_flags in
C)
flags=("${flags[@]}" "${SPACK_CFLAGS[@]}") ;;
CXX)
flags=("${flags[@]}" "${SPACK_CXXFLAGS[@]}") ;;
esac
flags=(${SPACK_TARGET_ARGS[@]} "${flags[@]}")
;;
esac
# Linker flags
case "$mode" in
ld|ccld)
flags=("${flags[@]}" "${SPACK_LDFLAGS[@]}") ;;
esac
# On macOS insert headerpad_max_install_names linker flag
if [[ ($mode == ld || $mode == ccld) && "$SPACK_SHORT_SPEC" =~ "darwin" ]];
then
case "$mode" in
ld)
flags=("${flags[@]}" -headerpad_max_install_names) ;;
ccld)
flags=("${flags[@]}" -Wl,-headerpad_max_install_names) ;;
esac
fi
IFS=':' read -ra rpath_dirs <<< "$SPACK_RPATH_DIRS"
if [[ $mode == ccld || $mode == ld ]]; then
if [[ "$add_rpaths" != "false" ]] ; then
# Append RPATH directories. Note that in the case of the
# top-level package these directories may not exist yet. For dependencies
# it is assumed that paths have already been confirmed.
rpaths=("${rpaths[@]}" "${rpath_dirs[@]}")
fi
fi
IFS=':' read -ra link_dirs <<< "$SPACK_LINK_DIRS"
if [[ $mode == ccld || $mode == ld ]]; then
libdirs=("${libdirs[@]}" "${link_dirs[@]}")
fi
# add RPATHs if we're in in any linking mode
case "$mode" in
ld|ccld)
# Set extra RPATHs
IFS=':' read -ra extra_rpaths <<< "$SPACK_COMPILER_EXTRA_RPATHS"
libdirs+=("${extra_rpaths[@]}")
if [[ "$add_rpaths" != "false" ]] ; then
rpaths+=("${extra_rpaths[@]}")
fi
# Set implicit RPATHs
IFS=':' read -ra implicit_rpaths <<< "$SPACK_COMPILER_IMPLICIT_RPATHS"
if [[ "$add_rpaths" != "false" ]] ; then
rpaths+=("${implicit_rpaths[@]}")
fi
# Add SPACK_LDLIBS to args
for lib in "${SPACK_LDLIBS[@]}"; do
libs+=("${lib#-l}")
done
;;
esac
#
# Finally, reassemble the command line.
#
# Includes and system includes first
args=()
# flags assembled earlier
args+=("${flags[@]}")
# Insert include directories just prior to any system include directories
for dir in "${includes[@]}"; do args+=("-I$dir"); done
for dir in "${isystem_includes[@]}"; do args+=("-isystem$dir"); done
IFS=':' read -ra spack_include_dirs <<< "$SPACK_INCLUDE_DIRS"
if [[ $mode == cpp || $mode == cc || $mode == as || $mode == ccld ]]; then
if [[ "$isystem_was_used" == "true" ]] ; then
for dir in "${spack_include_dirs[@]}"; do args+=("-isystem$dir"); done
else
for dir in "${spack_include_dirs[@]}"; do args+=("-I$dir"); done
fi
fi
for dir in "${system_includes[@]}"; do args+=("-I$dir"); done
for dir in "${isystem_system_includes[@]}"; do args+=("-isystem$dir"); done
# Library search paths
for dir in "${libdirs[@]}"; do args+=("-L$dir"); done
for dir in "${system_libdirs[@]}"; do args+=("-L$dir"); done
# RPATHs arguments
case "$mode" in
ccld)
if [ ! -z "$dtags_to_add" ] ; then args+=("$linker_arg$dtags_to_add") ; fi
for dir in "${rpaths[@]}"; do args+=("$rpath$dir"); done
for dir in "${system_rpaths[@]}"; do args+=("$rpath$dir"); done
;;
ld)
if [ ! -z "$dtags_to_add" ] ; then args+=("$dtags_to_add") ; fi
for dir in "${rpaths[@]}"; do args+=("-rpath" "$dir"); done
for dir in "${system_rpaths[@]}"; do args+=("-rpath" "$dir"); done
;;
esac
# Other arguments from the input command
args+=("${other_args[@]}")
# Inject SPACK_LDLIBS, if supplied
for lib in "${libs[@]}"; do
args+=("-l$lib");
done
full_command=("$command" "${args[@]}")
# prepend the ccache binary if we're using ccache
if [ -n "$SPACK_CCACHE_BINARY" ]; then
case "$lang_flags" in
C|CXX) # ccache only supports C languages
full_command=("${SPACK_CCACHE_BINARY}" "${full_command[@]}")
# workaround for stage being a temp folder
# see #3761#issuecomment-294352232
export CCACHE_NOHASHDIR=yes
;;
esac
fi
# dump the full command if the caller supplies SPACK_TEST_COMMAND=dump-args
if [[ $SPACK_TEST_COMMAND == dump-args ]]; then
IFS="
" && echo "${full_command[*]}"
exit
elif [[ -n $SPACK_TEST_COMMAND ]]; then
die "ERROR: Unknown test command"
fi
#
# Write the input and output commands to debug logs if it's asked for.
#
if [[ $SPACK_DEBUG == TRUE ]]; then
input_log="$SPACK_DEBUG_LOG_DIR/spack-cc-$SPACK_DEBUG_LOG_ID.in.log"
output_log="$SPACK_DEBUG_LOG_DIR/spack-cc-$SPACK_DEBUG_LOG_ID.out.log"
echo "[$mode] $command $input_command" >> "$input_log"
echo "[$mode] ${full_command[*]}" >> "$output_log"
fi
exec "${full_command[@]}"
|