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Detect when llvm or clang sources have changed and rebuild llvm/clang automatically. 

llvm-svn: 203594
This commit is contained in:
Greg Clayton 2014-03-11 18:24:32 +00:00
parent 0bc22877a2
commit bf56cb50a8
1 changed files with 92 additions and 5 deletions
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97
lldb/scripts/build-llvm.pl
View File

@ -11,7 +11,9 @@
use strict;
use File::Basename;
use File::Glob ':glob';
use File::Slurp;
use List::Util qw[min max];
use Digest::MD5 qw(md5_hex);
our $llvm_srcroot = $ENV{SCRIPT_INPUT_FILE_0};
our $llvm_dstroot = $ENV{SCRIPT_INPUT_FILE_1};
@ -49,7 +51,10 @@ else
{
die "Unsupported LLVM configuration: '$llvm_configuration'\n";
}
our @llvm_repositories = (
"$llvm_srcroot",
"$llvm_srcroot/tools/clang"
);
our @archive_files = (
"$llvm_configuration/lib/libclang.a",
"$llvm_configuration/lib/libclangAnalysis.a",
@ -157,6 +162,28 @@ sub build_llvm
#my $extra_svn_options = $debug ? "" : "--quiet";
# Make the llvm build directory
my $arch_idx = 0;
# Calculate if the current source digest so we can compare it to each architecture
# build folder
my @llvm_md5_strings;
foreach my $repo (@llvm_repositories)
{
if (-d "$repo/.svn")
{
push(@llvm_md5_strings, `svn info '$repo'`);
push(@llvm_md5_strings, `svn diff '$repo'`);
}
elsif (-d "$repo/.git")
{
push(@llvm_md5_strings, `cd '$repo'; git branch -v`);
push(@llvm_md5_strings, `cd '$repo'; git diff`);
}
}
#print "LLVM MD5 will be generated from:\n";
#print @llvm_md5_strings;
my $llvm_hex_digest = md5_hex(@llvm_md5_strings);
#print "llvm MD5: $llvm_hex_digest\n";
foreach my $arch (@archs)
{
my $llvm_dstroot_arch = "${llvm_dstroot}/${arch}";
@ -165,6 +192,8 @@ sub build_llvm
my $do_configure = 0;
my $do_make = 0;
my $is_arm = $arch =~ /^arm/;
my $save_arch_digest = 1;
my $arch_digest_file = "$llvm_dstroot_arch/md5";
my $llvm_dstroot_arch_archive = "$llvm_dstroot_arch/$llvm_clang_basename";
print "LLVM architecture root for ${arch} exists at '$llvm_dstroot_arch'...";
@ -173,6 +202,7 @@ sub build_llvm
print "YES\n";
$do_configure = !-e "$llvm_dstroot_arch/config.log";
my @archive_modtimes;
# dstroot for llvm build exists, make sure all .a files are built
for my $llvm_lib (@archive_files)
{
@ -182,13 +212,65 @@ sub build_llvm
$do_make = 1;
}
}
if (!-e $llvm_dstroot_arch_archive)
if ($do_make == 0)
{
$do_make = 1;
if (-e $arch_digest_file)
{
my $arch_hex_digest = read_file($arch_digest_file);
if ($arch_hex_digest eq $llvm_hex_digest)
{
# No sources have been changed or updated
$save_arch_digest = 0;
}
else
{
# Sources have changed, or svn has been updated
print "Sources have changed, rebuilding...\n";
$do_make = 1;
}
}
else
{
# No MD5 digest, we need to make
print "Missing MD5 digest file '$arch_digest_file', rebuilding...\n";
$do_make = 1;
}
if ($do_make == 0)
{
if (-e $llvm_dstroot_arch_archive)
{
# the final archive exists, check the modification times on all .a files that
# make the final archive to make sure we don't need to rebuild
my $llvm_dstroot_arch_archive_modtime = (stat($llvm_dstroot_arch_archive))[9];
for my $llvm_lib (@archive_files)
{
if (-e "$llvm_dstroot_arch/$llvm_lib")
{
if ($llvm_dstroot_arch_archive_modtime < (stat("$llvm_dstroot_arch/$llvm_lib"))[9])
{
print "'$llvm_dstroot_arch/$llvm_lib' is newer than '$llvm_dstroot_arch_archive', rebuilding...\n";
$do_make = 1;
last;
}
}
}
if ($do_make == 0)
{
print "LLVM architecture archive for ${arch} is '$llvm_dstroot_arch_archive' and is up to date.\n";
}
}
else
{
$do_make = 1;
}
}
}
else
if ($do_make)
{
print "LLVM architecture archive for ${arch} is '$llvm_dstroot_arch_archive'\n";
unlink($llvm_dstroot_arch_archive);
}
}
else
@ -235,6 +317,11 @@ sub build_llvm
}
}
}
if ($save_arch_digest)
{
write_file($arch_digest_file, \$llvm_hex_digest);
}
if ($do_configure)
{