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130 lines
3.3 KiB
130 lines
3.3 KiB
# UCW Library configuration system: parameters of the library
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# (c) 2005--2012 Martin Mares <mj@ucw.cz>
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# (c) 2006 Robert Spalek <robert@ucw.cz>
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# (c) 2008 Michal Vaner <vorner@ucw.cz>
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# (c) 2020 Pavel Charvat <pchar@ucw.cz>
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package UCW::Configure::LibUCW;
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use UCW::Configure;
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use strict;
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use warnings;
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# Turn on debugging support if CONFIG_DEBUG
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if (Get("CONFIG_DEBUG")) {
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Set("CONFIG_UCW_DEBUG");
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}
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# Determine page size
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Test("CPU_PAGE_SIZE", "Determining page size", sub {
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my $p;
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if (IsSet("CONFIG_DARWIN")) {
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$p = `sysctl -n hw.pagesize`;
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defined $p or Fail "sysctl hw.pagesize failed";
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} elsif (IsSet("CONFIG_LINUX")) {
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$p = `getconf PAGE_SIZE`;
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defined $p or Fail "getconf PAGE_SIZE failed";
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}
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chomp $p;
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return $p;
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});
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# Decide how will ucw/partmap.c work
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Set("CONFIG_UCW_PARTMAP_IS_MMAP") if IsSet("CPU_64BIT_POINTERS");
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# Option for ucw/mempool.c
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Set("CONFIG_UCW_POOL_IS_MMAP");
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# Guess optimal bit width of the radix-sorter
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Test("CONFIG_UCW_RADIX_SORTER_BITS", "Determining radix sorter bucket width", sub {
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if (Get("CPU_AMD64")) {
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# All amd64 CPUs have large enough L1 cache
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return 12;
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} else {
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# This should be safe everywhere
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return 10;
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}
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});
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# Detect if thread-local storage is supported
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if (Get("CONFIG_UCW_THREADS")) {
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TestBool("CONFIG_UCW_TLS", "Checking if GCC supports thread-local storage", sub {
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if (UCW::Configure::C::TestCompile("__thread", "__thread int i;\nint main(void) { return 0; }\n")) {
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return 1;
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} else {
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return 0;
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}
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});
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}
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# Detect if we have the epoll() syscall
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TestBool("CONFIG_UCW_EPOLL", "Checking for epoll", sub {
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return UCW::Configure::C::TestCompile("epoll", <<'FINIS' ) ? 1 : 0;
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#include <sys/epoll.h>
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int main(void)
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{
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epoll_create(256);
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return 0;
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}
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FINIS
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});
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# Detect if we have the getrandom() syscall
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TestBool("CONFIG_UCW_GETRANDOM", "Checking for getrandom", sub {
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return UCW::Configure::C::TestCompile("getrandom", <<'FINIS' ) ? 1 : 0;
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#include <sys/random.h>
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int main(void)
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{
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char c;
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getrandom(&c, 1, 0);
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return 0;
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}
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FINIS
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});
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# Check if we want to use monotonic clock
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TestBool("CONFIG_UCW_MONOTONIC_CLOCK", "Checking for monotonic clock", sub {
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return Get("CONFIG_LINUX");
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});
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if (IsSet("CONFIG_DARWIN")) {
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# Darwin does not support BSD regexes, fix up
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if (!IsSet("CONFIG_UCW_POSIX_REGEX") && !IsSet("CONFIG_UCW_PCRE")) {
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Set("CONFIG_UCW_POSIX_REGEX" => 1);
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Warn "BSD regex library on Darwin isn't compatible, using POSIX regex.\n";
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}
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# Fill in some constants not found in the system header files
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Set("SOL_TCP" => 6); # missing in /usr/include/netinet/tcp.h
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if (IsGiven("CONFIG_UCW_DIRECT_IO") && IsSet("CONFIG_UCW_DIRECT_IO")) {
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Fail("Direct I/O is not available on darwin");
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} else {
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UnSet("CONFIG_UCW_DIRECT_IO");
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}
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}
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PostConfig {
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AtWrite {
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UCW::Configure::C::ConfigHeader("ucw/autoconf.h", [
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# Included symbols
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'^CONFIG_UCW_' => 1,
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'^CPU_' => 1,
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'^UCW_VERSION(_|$)' => 1,
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]);
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} if Get("CONFIG_INSTALL_API");
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# Include direct FB?
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if (!IsSet("CONFIG_UCW_THREADS") || !IsSet("CONFIG_UCW_DIRECT_IO")) {
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if (IsGiven("CONFIG_UCW_FB_DIRECT") && IsSet("CONFIG_UCW_FB_DIRECT")) {
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if (!IsSet("CONFIG_UCW_THREADS")) {
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Fail("CONFIG_UCW_FB_DIRECT needs CONFIG_UCW_THREADS");
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} else {
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Fail("CONFIG_UCW_FB_DIRECT needs CONFIG_UCW_DIRECT_IO");
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}
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}
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UnSet("CONFIG_UCW_FB_DIRECT");
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}
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};
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# We succeeded
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1;
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