o3: correct the number of cc registers in rename map

[gem5.git] / ext / libelf / SConscript

diff --git a/ext/libelf/SConscript b/ext/libelf/SConscript
index 2fae8c25f1a3d6d84d5e7ee3121418a5c4b9a5ac..a110602ccf8a70dfec9e8b4d3d2830df4e83cfe6 100644 (file)
--- a/ext/libelf/SConscript
+++ b/ext/libelf/SConscript
@@ -28,18 +28,22 @@
 #
 # Authors: Nathan Binkert
 
-import os
+import os, subprocess
 
-Import('env')
+Import('main')
+
+from m5.util import compareVersions
 
 elf_files = []
 def ElfFile(filename):
     elf_files.append(File(filename))
-    
+
 ElfFile('elf_begin.c')
 ElfFile('elf_cntl.c')
 ElfFile('elf_data.c')
 ElfFile('elf_end.c')
+ElfFile('elf_errmsg.c')
+ElfFile('elf_errno.c')
 ElfFile('elf_fill.c')
 ElfFile('elf_flag.c')
 ElfFile('elf_getarhdr.c')
@@ -87,8 +91,34 @@ ElfFile('libelf_convert.c')
 ElfFile('libelf_fsize.c')
 ElfFile('libelf_msize.c')
 
-m4env = Environment(ENV=os.environ)
-m4env.Append(M4FLAGS='-DSRCDIR=%s' % Dir('.').path)
+m4env = main.Clone()
+if m4env['GCC']:
+    m4env.Append(CCFLAGS=['-Wno-pointer-sign'])
+    if compareVersions(m4env['GCC_VERSION'], '4.6') >= 0:
+        m4env.Append(CCFLAGS=['-Wno-unused-but-set-variable',
+                              '-Wno-implicit-function-declaration'])
+if m4env['CLANG']:
+    m4env.Append(CCFLAGS=['-Wno-initializer-overrides', '-Wno-pointer-sign'])
+    # clang defaults to c99 (while gcc defaults to gnu89) and there is a
+    # difference in the handling of inlining functions which causes
+    # linking problems with multiple definitions of the symbols in
+    # sysmacros.h for older versions of glibc
+    m4env.Append(CCFLAGS=['-std=gnu89'])
+m4env.Append(CCFLAGS=['-Wno-implicit'])
+del m4env['CPPPATH']
+
+# If we have gm4 use it
+if m4env.Detect('gm4'):
+    m4env['M4'] = 'gm4'
+
+# Check that m4 is available
+import SCons.Tool.m4
+if not SCons.Tool.m4.exists(m4env):
+   print "Error: Can't find version of M4 macro processor.  " + \
+         "Please install M4 and try again."
+   Exit(1)
+
+m4env.Append(M4FLAGS=['-DSRCDIR=%s' % Dir('.').path])
 m4env['M4COM'] = '$M4 $M4FLAGS $SOURCES > $TARGET'
 m4env.M4(target=File('libelf_convert.c'),
          source=[File('elf_types.m4'), File('libelf_convert.m4')])
@@ -96,8 +126,12 @@ m4env.M4(target=File('libelf_fsize.c'),
          source=[File('elf_types.m4'), File('libelf_fsize.m4')])
 m4env.M4(target=File('libelf_msize.c'),
          source=[File('elf_types.m4'), File('libelf_msize.m4')])
-m4env.Library('elf', elf_files)
 
-env.Append(CPPPATH=Dir('.'))
-env.Append(LIBS=['elf'])
-env.Append(LIBPATH=[Dir('.')])
+# Build libelf as a static library with PIC code so it can be linked
+# into either m5 or the library
+m4env.Library('elf', [m4env.SharedObject(f) for f in elf_files])
+
+main.Prepend(CPPPATH=Dir('.'))
+main.Append(LIBS=['elf'])
+main.Prepend(LIBPATH=[Dir('.')])
+