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configure
executable file
·1196 lines (1096 loc) · 32.6 KB
/
configure
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#!/usr/bin/env bash
# Copyright 2010-2014 RethinkDB, all rights reserved.
# This script detects the build settings local to the local build
# environment and saves them in the config.mk file.
#
# See ./configure --help for more information.
set -u
# Lists of dependencies and versions
init () {
min_gcc_version=$(read_version 4.6.3)
min_clang_version=0
min_icc_version=0
min_lessc_version=1.3.1
max_lessc_version=1.6.2
min_coffee_version=1.7.0
max_coffee_version=1.7.1
min_browserify_version=3.0.0
max_browserify_version=3.24.13
min_python_version=2.6.0
must_fetch_list='bluebird v8'
please_fetch_list="handlebars gtest re2 $must_fetch_list"
optional_libs="gtest termcap boost_system ssl"
required_libs="protobuf icui18n icuuc icudata v8 re2 z crypto curl"
other_libs="unwind tcmalloc jemalloc"
all_libs="$required_libs $optional_libs $other_libs"
default_static="tcmalloc jemalloc"
web_assets_deps="npm coffee browserify bluebird"
required_bin_deps="protoc python"
optional_bin_deps="wget curl"
bin_deps="cxx $web_assets_deps $required_bin_deps $optional_bin_deps"
all_deps="$bin_deps $all_libs boost"
default_allocator_linux=jemalloc
default_allocator_osx=system
allowed_arg_vars="CXXFLAGS LDFLAGS"
}
# The main configuration steps
configure () {
require "Bash"
show "$BASH_VERSION"
var FETCH_LIST ""
var FETCH_VERSIONS ""
for var in $allowed_arg_vars; do
local val
if lookup "$arg_vars" $var val; then
require $var
var $var "$val"
fi
done
var LIB_SEARCH_PATHS $(for path in $lib_paths; do echo " -L$path"; done)
require "Use ccache"
boolvar USE_CCACHE $use_ccache
check_cxx
require "Host System"
var MACHINE $($CXX -dumpmachine)
require "Build System"
show "`uname -msr`"
check_cross_compiling
require "Host Operating System"
case "${MACHINE#*-}" in
*apple-darwin*)
var OS "Darwin"
default_allocator=$default_allocator_osx
var PTHREAD_LIBS "" ;
var RT_LIBS "" ;;
*linux*)
var OS "Linux"
default_allocator=$default_allocator_linux
var PTHREAD_LIBS -pthread ;
var RT_LIBS -lrt ;;
*) error "unsupported operating system: $MACHINE" ;;
esac
case "${MACHINE%%-*}" in
x86_64|i?86)
true ;;
arm*)
var_append LDFLAGS -ldl
final_warning="ARM support is still experimental" ;;
*)
error "unsupported architecture: $MACHINE"
esac
var M_LIBS -lm
require "Build Architecture"
var GCC_ARCH $(uname -m | grep '^[A-Za-z0-9_]*$' | head -n 1)
var GCC_ARCH_REDUCED $(echo "$GCC_ARCH" | sed -e 's/^i[56]86$$/i486/g')
if [ "$COMPILER" = CLANG ]; then
require stdlib
case "$OS" in
Darwin) var_append LDFLAGS -lc++
var_append CXXFLAGS -stdlib=libc++ ;;
*) var_append LDFLAGS -lstdc++ ;;
esac
fi
check_cxx11
require "Precompiled web assets"
if [[ -z "$enable_precompiled_web" ]]; then
if test -d precompiled/web; then
enable_precompiled_web=true
else
enable_precompiled_web=false
fi
fi
boolvar USE_PRECOMPILED_WEB_ASSETS $enable_precompiled_web
for bin in $required_bin_deps; do
require_dep $bin
check_bin $bin
done
for bin in $web_assets_deps; do
if $enable_precompiled_web; then
optional_dep $bin
else
require_dep $bin
fi
check_bin $bin
done
check_admin_deps
for bin in $optional_bin_deps; do
optional_dep $bin
check_bin $bin
done
build_try_lib_paths
for lib in $optional_libs; do
check_lib $lib optional
done
for lib in $required_libs; do
check_lib $lib require
done
check_v8_pre_3_19
require malloc
var ALLOCATOR "${custom_allocator:-$default_allocator}"
var DEFAULT_ALLOCATOR "$default_allocator"
if [[ "$ALLOCATOR" = system ]]; then
var MALLOC_LIBS ""
var MALLOC_LIBS_DEP ""
boolvar STATIC_MALLOC false
else
check_lib "$ALLOCATOR" require
boolvar STATIC_MALLOC contains "$static_libs" "$ALLOCATOR"
macro MALLOC_LIBS "\$($(uc $ALLOCATOR)_LIBS)"
macro MALLOC_LIBS_DEP "\$($(uc $ALLOCATOR)_LIBS_DEP)"
fi
test_protobuf
check_boost
boolvar STATIC_V8 contains "$static_libs" v8
boolvar ALLOW_FETCH $allow_fetch
require Installation prefix
var PREFIX ${arg_prefix:-/usr/local}
require Configuration prefix
var SYSCONFDIR ${arg_sysconfdir:-$PREFIX/etc}
require Runtime data prefix
var LOCALSTATEDIR ${arg_localstatedir:-$PREFIX/var}
for pkg in $must_fetch_list; do
if ! contains "$FETCH_LIST" $pkg; then
require_dep $pkg
fetch_pkg $pkg
fi
done
if [ -n "${final_warning:-}" ]; then
echo "* Warning: $final_warning"
fi
}
# Entry point
main () {
init
if test -e configure.default; then
echo "* Reading arguments from 'configure.default'"
default_args=$(cat configure.default)
echo "* Prepending the following arguments:" $default_args
fi
read_args ${default_args:-} "$@"
echo "* Detecting system configuration"
trap "show error; echo '* Aborting configure'" EXIT
write "# Automatically generated by $0" 3> "$config"
write "# Command line: $@" 3>> "$config"
write "CONFIGURE_STATUS := started" 3>> "$config"
write "CONFIGURE_ERROR := " 3>> "$config"
write "CONFIGURE_COMMAND_LINE := $(echo ${default_args:-}) $@" 3>> "$config"
write "CONFIGURE_MAGIC_NUMBER := 2" 3>> "$config"
configure 3>> "$config"
trap - EXIT
if ! $failed; then
write "CONFIGURE_STATUS := success" 3>> "$config"
echo "* Wrote configuration to $config"
else
write "CONFIGURE_STATUS := failed" 3>> "$config"
echo "* Aborting configure"
exit 1
fi
}
# Parse the command line arguments
read_args () {
local no_arg
local has_arg
local arg
local option
local dep
exit_on_error=true
config=config.mk
failed=false
allow_fetch=false
force_paths='=|'
can_show=false
required=false
arg_vars=$'\1\2'
lib_paths=
static_libs=$default_static
arg_prefix=
arg_sysconfdir=
arg_localstatedir=
custom_allocator=
enable_precompiled_web=
use_ccache=false
while [[ $# -ne 0 ]]; do
arg=${1#*=}
if [[ "$arg" = "$1" ]]; then
no_arg=shift
if [[ $# -eq 1 ]]; then
has_arg="error_missing_arg $(quote "$1")"
else
arg=$2
has_arg='shift 2'
fi
else
no_arg="error_no_arg $(quote "$1")"
has_arg=shift
fi
option="${1%%=*}"
case "$option" in
--debug-configure) $no_arg; set -x ;;
--config) $has_arg; config=$arg ;;
--continue) $no_arg; exit_on_error=false ;;
--allow-fetch) $no_arg; allow_fetch=true ;;
--fetch) $has_arg
if [[ "$arg" = "all" ]]; then
please_fetch_list="$(all_fetch_deps)"
elif can_fetch $(guess_pkg_name "$arg"); then
please_fetch_list="$please_fetch_list $(guess_pkg_name "$arg")"
else
die "Don't know how to fetch '$arg'"
fi ;;
--static) $has_arg
if [[ "$arg" = none ]]; then
static_libs=
elif [[ "$arg" = all ]]; then
static_libs=$all_libs
elif contains "$all_libs" "$arg"; then
static_libs="$static_libs $arg"
else
die "Unknown library: $arg"
fi ;;
--dynamic) $has_arg
if [[ "$arg" = none ]]; then
static_libs=$all_libs
elif [[ "$arg" = all ]]; then
static_libs=
elif contains "$all_libs" "$arg"; then
static_libs=$(remove "$static_libs" "$arg")
please_fetch_list=$(remove "$please_fetch_list" $(guess_pkg_name "$arg"))
else
die "Unknown library: $arg"
fi ;;
--lib-path) $has_arg; lib_paths="$lib_paths $arg" ;;
--with-tcmalloc) $no_arg; set_custom_allocator tcmalloc ;;
--with-jemalloc) $no_arg; set_custom_allocator jemalloc ;;
--with-system-malloc) $no_arg; set_custom_allocator system ;;
--enable-precompiled-web) $no_arg; enable_precompiled_web=true ;;
--disable-precompiled-web) $no_arg; enable_precompiled_web=false ;;
--ccache) $no_arg; use_ccache=true ;;
--prefix) $has_arg; arg_prefix=$arg ;;
--sysconfdir) $has_arg; arg_sysconfdir=$arg ;;
--localstatedir) $has_arg; arg_localstatedir=$arg ;;
--help) show_help; exit ;;
-*) die "Unknown option '$option'" ;;
*) if contains "$all_deps" "$(lc $option)"; then
$has_arg
force_paths="$force_paths|$(lc $option)=$arg|"
elif contains "$allowed_arg_vars" "$option"; then
$has_arg
arg_vars="$arg_vars"$'\2'"$option"$'\1'"$arg"
else
die "Unknown variable argument: $option"
fi ;;
esac
done
}
set_custom_allocator () {
if [[ -n "$custom_allocator" ]]; then
die "incompatible options: --with-$custom_allocator and --with-$1"
fi
custom_allocator=$1
}
# Description of some of the dependencies
dep_descrs=':
cxx:C++ Compiler
protoc:Protobuf compiler
npm:Node.js package manager
unwind:libunwind
v8:v8 javascript engine
protobuf:Protobuf library
browserify:Browserify
v8:V8 JavaScript Engine
re2:RE2
z:zlib
gtest:Google Test'
# Output of --help
show_help () {
cat <<EOF
Configure a RethinkDB build from source
Usage: $0 [arguments]
--help Display this help
--config <file> Output file (default config.mk)
--continue Do not stop after encountering an error
--allow-fetch Allow fetching missing dependencies
--lib-path <dir> Add dir to the library search path
<var>=<val> Set the value of a variable
CXXFLAGS C++ compiler arguments
LDFLAGS C++ linker arguments
--fetch <dep> Force fetching <dep>.
<dep>=<path> Library or executable path. <dep> can be
EOF
for dep in $all_deps; do
local padded="$dep "
local descr
lookup "$dep_descrs" $dep descr || descr=
echo " ${padded:0:24} $descr"
done
cat <<EOF
--static <lib> Statically link some libraries. <lib> is a library name, 'all' or 'none'
--dynamic <lib> Dynamically link some libraries. <lib> is a library name, 'all' or 'none'
--prefix <dir> Installation prefix. Defaults to /usr/local
--sysconfdir <dir> Configuration prefix. Defaults to /usr/local/etc
--localstatedir <dir> Runtime data prefix. Defaults to /usr/local/var
--with-tcmalloc Use TCMalloc
--with-jemalloc Use jemalloc (default on Linux)
--with-system-malloc Use the system malloc (default on OS X)
--enable-precompiled-web
--disable-precompiled-web Use precompiled web assets located in precompiled/web (default: autodetect)
--ccache Speed up the build using ccache
EOF
}
# Quote for re-use in the shell
# quote 'a b' -> 'a\ b'
quote () {
printf %q "$1"
}
# Some error messages
error_no_arg () { die "option ${1%%=*} does not take any arguments"; }
error_missing_arg () { die "option ${1%%=*} takes an argument"; }
# error <message>
# Try to generate an error
# If $delayed_errors, then save the error for later
# If not $required, turn it into a warning
error () {
local req=$required
if ${delay_errors:-false}; then
delayed_error="$*"
return
fi
local type
if $req; then
show "error"
type=Error
else
show "no"
type=Warning
fi
if $req || ! ${ignore_warnings:-false}; then
echo "* $type: $*" >&2
fi
write "CONFIGURE_ERROR := $*"
if $req; then
echo "${error_details:-}" | head -n 5
if $exit_on_error; then
exit 1
fi
fi
failed=$req
}
# Like error, but fatal
die () {
show error
required=true
error "$@"
exit 1
}
# not_found <name>
# Generate a not found error
not_found () {
if $required; then
if can_fetch $(guess_pkg_name "`lc $1`"); then
error "missing $1. Install it, specify the full path with $(uc $1)= or run ./configure with --allow-fetch"
else
error "missing $1. Install it or specify the full path with $(uc $1)="
fi
else
show no
fi
}
# write <line>
# Write to the config file
write () {
echo "$*" >&3
}
# show_descr <description>
# Describe what the script is looking for next
# A call to show will complete the line
show_descr () {
if ${can_show:-false}; then
show_no
fi
local padded="$*: "
echo -n "${padded:0:32}"
write "# $*"
can_show=true
error_details=
}
# show_no [package_descr] [package_name]
# Like 'show no', but show the delayed error if there is one
show_no () {
local req=$required
local err=$delayed_error
local info=""
show no
if $req; then
if can_fetch "$(guess_pkg_name "${2:-$1}")"; then
info=" Try running ./configure with the --fetch ${2:-$1} or --allow-fetch flags."
fi
error "${err:-${1:-} not found.$info}"
elif [[ -n "$delayed_error" ]]; then
error "$err"
fi
}
# show <value>
# Display the value that was found
show () {
if $can_show; then
echo "$*"
can_show=false
fi
delayed_error=
delay_errors=false
}
# Like show_descr, but set $required to true
require () {
required=true
show_descr "$@"
}
# Like show_descr, but set $required to false
optional () {
required=false
show_descr "$@"
}
# var <name> <value>
# Set the value of a variable in the config file
var () {
local name=$1
shift
local val=$*
show "$val"
write "$name := $val"
eval "$name=$(quote "$val")" 2>/dev/null
}
# macro <name> <value>
# Set the value of a macro variable in the config file
macro () {
local name=$1
shift
local val=$*
show "$val"
write "$name = $val"
}
# var_append <name> <value>
# Append a value to a variable in to the config file
var_append () {
local name=$1
shift
local val=$*
show "$val"
write "$name += $val"
eval "$name=\${$name:-}\ $(quote "$val")"
}
# boolvar <name> <command> <arguments ...>
# Run the command and set the variable to its boolean return value
boolvar () {
local name=$1
shift
if "$@"; then
show yes
var $name 1
else
show no
var $name 0
fi
}
# Find a C++ compiler that rethinkdb supports
check_cxx () {
require "C++ Compiler"
local force_CXX
lookup "$force_paths" cxx force_CXX || :
CXX="${force_CXX:-${CXX:-}}"
if test -z "$CXX" || ! $CXX --version >/dev/null 2>&1; then
if [[ -n "${force_CXX:-}" ]]; then
error "unable to run $force_CXX"
return
fi
CXX=$(command -v c++ 2>/dev/null || command -v g++ 2>/dev/null || command -v clang 2>/dev/null || command -v icc 2>/dev/null)
if [[ -z "$CXX" ]]; then
not_found CXX
return
fi
fi
local description=$($CXX --version 2>/dev/null)$($CXX --help 2>/dev/null)
local version_string=$(echo "$description" | extract_version_string)
local type=$(echo "$description" | egrep -io 'gcc|g\+\+|clang|icc' | head -n 1)
case "$(uc $type)" in
GCC|G++) min_version=$min_gcc_version
type=GCC ;;
CLANG) min_version=$min_clang_version ;;
ICC) min_version=$min_icc_version
type=INTEL ;;
*) show "unknown"
error "Could not determine C++ compiler type of $CXX (gcc, clang or icc is required)"
return
esac
if [[ -z "$version_string" ]]; then
show "$(uc $type) (unknown version)"
error "Could not determine C++ compiler version (>= $(write_version $min_version) required)"
return
else
show "$(uc $type) $version_string ($CXX)"
test_version_ge $(uc $type) $(read_version "$version_string") $min_version || return
fi
var COMPILER "$(uc $type)"
var CXX "$CXX"
}
# foo --version | extract_version_string
# find a version string in the output of foo --version
extract_version_string () {
sed 's/([^)]*)//g' | egrep -o '[0-9]+\.[0-9]+(\.[0-9]+)?' | head -n 1
}
# read_version "1.2.3" -> 10203
# read_version "2.14" -> 21400
read_version () {
local one=${1%%.*}
local rest=${1#*.}
local two=${rest%%.*}
rest=${rest#*.}
local three=${rest%%.*}
if [[ "$three" != "$rest" ]]; then three=0; fi
printf %d%02d%02d "$one" "$two" "$three"
}
# write_version "10203" -> "1.2.3"
write_version () {
local v=$(printf %06d "$1")
local v1=${v:0:2}
local v2=${v:2:2}
local v3=${v:4:2}
printf %d.%d.%d "${v1#0}" "${v2#0}" "${v3#0}"
}
# test_version_ge <name> <version> <min version>
test_version_ge () {
local fetch_message=
if ! [[ $2 -ge $3 ]]; then
if can_fetch "$(bin_pkg_name "$1")"; then
fetch_message=" Try running ./configure with --allow-fetch"
fi
error "$1 $(write_version $2) is too old. At least $1 $(write_version $3) is required.$fetch_message"
return 1
fi
}
# test_version_le <name> <version> <max version>
test_version_le () {
local fetch_message=
if ! [[ $2 -le $3 ]]; then
if can_fetch "$(bin_pkg_name "$1")"; then
fetch_message=" Try running ./configure with --allow-fetch"
fi
error "$1 $(write_version $2) is too recent. At most $1 $(write_version $3) is required.$fetch_message"
return 1
fi
}
# test_bin_version <name> <path>
test_bin_version () {
local min_var=min_$1_version
local min=${!min_var:-}
local max_var=max_$1_version
local max=${!max_var:-}
local invalid_var=invalid_$1_versions
local invalid=${!invalid_var:-}
test -z "$min$max$invalid" && return 0
local output
local ver
if output=$("$2" --version 2>&1) &&
ver=$(echo "$output" | extract_version_string) &&
test -n "$ver" ;
then
local version=$(read_version "$ver")
test -z "$min" || test_version_ge $1 $version $(read_version $min) || return 1
test -z "$max" || test_version_le $1 $version $(read_version $max) || return 1
if contains "$invalid" "$ver" ; then
error "$1 ($ver) is not supported"
return 1
fi
else
error "Could not determine $1 version"
return 1
fi
show "$1 $ver"
}
# contains <haystack> <needle>
# Test if the space-separated list haystack contains needle
contains () {
local d=" $1 "
[[ "${d% $2 *}" != "$d" ]]
}
# remove <list> <item>
# remove an item from a space-separated list
remove () {
if contains "$1" "$2"; then
local outputlist=""
for item in $1; do
if [ "$item" != "$2" ]; then
if [ -z "$outputlist" ]; then
outputlist="$item"
else
outputlist="$outputlist $item"
fi
fi
done
echo -n "$outputlist"
else
echo -n "$1"
fi
}
# any "<list>" <command>
# Test if the command is true for any element of the space seperated list
any () {
local list=$1
shift
for x in $list; do
if "$@" $x; then
return 0
fi
done
return 1
}
# lookup <dict> <key> [var]
# dict is an assoc-list composed of two seperators followed by a list of pairs
# eg: ':|foo:bar|test:123|baz:quux' or '= a=b c=d'
lookup () {
local _val=${1#*${1:1:1}$2${1:0:1}}
if [[ "$_val" = "$1" ]]; then
unset ${3:-$2}
return 1
fi
eval "${3:-$2}=$(quote "${_val%%${1:1:1}*}")"
}
# check_bin <name>
# Check for a binary
check_bin () {
local force_bin
lookup "$force_paths" $1 force_bin || force_bin=
if test -z "$force_bin" && contains "$please_fetch_list" $(bin_pkg_name "$1"); then
fetch_bin $1
return
fi
local ucbin=$(uc $1)
local bin=${force_bin:-${!ucbin:-$1}}
bin=$(command -v "$bin" 2>/dev/null)
if [[ ! -x "$bin" ]]; then
if [[ -n "${force_bin:-}" ]]; then
bin=$force_bin
elif fetch_allowed $(bin_pkg_name $1); then
fetch_bin $1
return
else
not_found $(uc $1)
return
fi
fi
local version
delay_errors=true
if ! test_bin_version $1 "$bin"; then
if fetch_allowed $(bin_pkg_name $1); then
fetch_bin $1
return
else
show_no "$1"
return
fi
fi
var "$(uc $1)" "$bin"
var "$(uc $1)_BIN_DEP" ""
}
# Invoke pkg.sh with the required environment variables
pkg () {
FETCH_LIST="$FETCH_LIST" bash $root/mk/support/pkg/pkg.sh "$@"
}
# add_fetch <name>
# Instruct make to fetch and build the dependency
# Sets the version variable
add_fetch () {
local pkg
pkg="$1"
if ! version=$(pkg version "$pkg"); then
error "Internal error: cannot fetch $pkg"
return 1
fi
show external/${pkg}_$version
if ! contains "$FETCH_LIST" "$pkg"; then
local depends
depends=$(pkg depends "$pkg")
for dep in $depends; do
fetch_pkg $dep
done
var_append FETCH_LIST "$pkg"
var "${pkg}_VERSION" "$version"
var "${pkg}_DEPENDS" "$depends"
fi
}
# Wrapper around add_fetch
fetch_pkg () {
local version
add_fetch "$1"
}
# Chose to fetch the given binary
fetch_bin () {
local version
pkg=$(bin_pkg_name "$1")
add_fetch "$pkg"
macro "$(uc "$1")" "\$(abspath \$(SUPPORT_BUILD_DIR)/${pkg}_$version/bin/$1)"
macro "$(uc "$1")_BIN_DEP" "\$(SUPPORT_BUILD_DIR)/${pkg}_$version/bin/$1"
}
# Chose to fetch the given library
fetch_lib () {
local pkg
local version
pkg=$(lib_pkg_name "$1")
add_fetch "$pkg"
var_append "$pkg"_LIB_NAME "$(uc "$1")"
var "HAS_$(uc "$1")" 1
macro "$(uc "$1")_LIBS_DEP" "\$(SUPPORT_BUILD_DIR)/${pkg}_$version/lib/lib$1.a"
macro "$(uc "$1")_INCLUDE" "-isystem \$(SUPPORT_BUILD_DIR)/${pkg}_$version/include"
macro "$(uc "$1")_INCLUDE_DEP" "\$(SUPPORT_BUILD_DIR)/${pkg}_$version/include"
static_libs="$static_libs $1"
}
# require_dep <name>
# Like require, but looks up the description for name
require_dep () {
local descr
lookup "$dep_descrs" $1 descr || descr=$1
require $descr
}
# optional_dep <name>
# Like optional, but looks up the description for name
optional_dep () {
local descr
lookup "$dep_descrs" $1 descr || descr=$1
optional $descr
}
# An assoc-list of c++ code to test if a library works
lib_test_code=':~
~termcap:
#include <termcap.h>
int main(){ tgetent(0, "xterm"); return 0; }
~boost:
#include <boost/bind.hpp>
int main(){ return 0; }
~cxx11:
// Verify that std::map uses the move constructor
#include <map>
struct C {
C(const C&) = delete;
C() { }
C(C &&) { }
};
int main() {
std::map<int, C> m;
m.insert(std::make_pair(0, C()));
}
~jemalloc:
#include <jemalloc/jemalloc.h>
int main(){
static_assert(JEMALLOC_VERSION_MAJOR >= 3, "jemalloc version 3 or above is required");
}
~'
# An assoc-list of possible library aliases
lib_alias=':
termcap:termcap tinfo ncurses
tcmalloc:tcmalloc_minimal'
# List the paths where static libraries can be found into the try_lib_paths variable
build_try_lib_paths () {
cc_paths=$($CXX -print-search-dirs 2>/dev/null | grep ^libraries | sed -e 's/^libraries[: =]*//; s/:/ /g')
LDCONFIG=$(PATH="$PATH:/sbin:/usr/sbin" command -v ldconfig 2>/dev/null)
if [[ -n "$LDCONFIG" ]]; then
ld_paths=$($LDCONFIG -v -N -X 2>/dev/null | grep -v '^ ' | sed -e 's/:$//' )
else
ld_paths="/usr/lib /usr/local/lib" # Default ld search paths on OSX
fi
try_lib_paths="$lib_paths $cc_paths $ld_paths"
try_lib_paths=$(for path in $try_lib_paths; do
test -d "$path" && niceabspath "$path"
done | sort -u)
}
# check_lib <name> <required/optional>
# Check for the presence of a library and set the correct make flags for it
# WISHLIST: Properly detect the presence of the headers and check that the
# installed version is compatible. Try using pkg-config.
check_lib () {
local info=$2
local path
if contains "$please_fetch_list $FETCH_LIST" $(lib_pkg_name "$1"); then
${info}_dep $1
fetch_lib $1
return
fi
if lookup "$force_paths" $1 path; then
${info}_dep $1
check_lib_compile "$path" $1
if $can_show; then
show_no "$path" "$1"
empty_deps_lib $1 false
fi
return
fi
local check
if contains "$static_libs" $1; then
static_info=" (static)"
check=check_static_lib
else
static_info=
check=check_dyn_lib
fi
$info "$1$static_info"
delay_errors=true
local aliases
lookup "$lib_alias" $1 aliases || aliases=$1
for lib in $aliases; do
$check $lib $1
if ! $can_show; then
empty_deps_lib $1 true
return
fi
done
if fetch_allowed $(lib_pkg_name $1); then
fetch_lib $1
else
show_no "lib$1$static_info" "$1"
empty_deps_lib $1 false
fi
}
empty_deps_lib () {
if ! "$2"; then
var "HAS_$(uc $1)" 0
var "$(uc $1)_LIBS" ""
else
var "HAS_$(uc $1)" 1
fi
var "$(uc $1)_INCLUDE" ""
var "$(uc $1)_INCLUDE_DEP" ""
var "$(uc $1)_LIBS_DEP" ""
}
check_dyn_lib () {
check_lib_compile -l$1 $2
}
# Test if the c++ compiler knows about the library
check_lib_compile () {
local bfile=$root/mk/gen/check_$2
local code
if ! lookup "$lib_test_code" $2 code; then
code='int main(){ return 0; }'
fi
echo "$code" > "$bfile.cc"
if $CXX -std=gnu++0x ${CXXFLAGS:-} ${LDFLAGS:-} ${LIB_SEARCH_PATHS:-} "$bfile.cc" $1 -o "$bfile.out" 1>"$bfile.log" 2>&1; then
show "${1:-ok}"
var_append $(uc $2)_LIBS "$1"
var HAS_$(uc $2) 1
else
error_details="${error_details:-}"$(cat "$bfile.log")
fi
}
# Test if we are cross-compiling
check_cross_compiling () {
require "Cross-compiling"
local bfile="$root/mk/gen/check_cross_compile"
echo "int main(){ return 0; }" > "$bfile.cc"
if ! $CXX ${CXXFLAGS:-} ${LDFLAGS:-} "$bfile.cc" -o "$bfile.out" 1>"$bfile.log" 2>&1; then
error_details=$(cat "$bfile.log")
error "Failed to compile"
else
if "$bfile.out" >/dev/null 2>&1; then
boolvar CROSS_COMPILING false
else
boolvar CROSS_COMPILING true
fi
fi
}
check_static_lib () {
local found=false
for path in $try_lib_paths; do
local l=$path/lib$1.a
if test -e "$l"; then
found=true
check_lib_compile "$l" "$2"
if ! $can_show; then
return 0
fi
fi
done
if ! $found; then
error_details="${error_details:-}"$"lib$1.a not found\n"
fi
}
# Some utility functions
# When bash 4 becomes ubiquitous, we can use ${//}, ${^^} and ${,,}
uc () { echo "$*" | tr '[:lower:]' '[:upper:]'; }