This bit:
+#ifndef errno
+ EXPLICIT_SYMBOL(errno);
+#endif
Is broken on Darwin.
— Gordon
On Jan 19, 2007, at 16:41, Reid Spencer wrote:
Changes in directory llvm/lib/System:
DynamicLibrary.cpp updated: 1.21 -> 1.22
---
Log message:
Help the lli interpreter find the stderr/stdin/stdout symbols.
These are
needed for output to be generated. On Linux these are both global
vars and
macro definitions so we have to special case Linux.
---
Diffs of the changes: (+19 -3)
DynamicLibrary.cpp | 22 +++++++++++++++++++---
1 files changed, 19 insertions(+), 3 deletions(-)
Index: llvm/lib/System/DynamicLibrary.cpp
diff -u llvm/lib/System/DynamicLibrary.cpp:1.21 llvm/lib/System/
DynamicLibrary.cpp:1.22
--- llvm/lib/System/DynamicLibrary.cpp:1.21 Fri Jan 19 15:30:39 2007
+++ llvm/lib/System/DynamicLibrary.cpp Fri Jan 19 15:41:04 2007
@@ -164,11 +164,23 @@
}
#undef EXPLICIT_SYMBOL
#endif
+
+// This macro returns the address of a well-known, explicit symbol
#define EXPLICIT_SYMBOL(SYM) \
if (!strcmp(symbolName, #SYM)) return &SYM
- // Try a few well known symbols just to give lli a shot at working.
- // Note that on some systems stdin, etc. are macros so we have to
- // avoid attempting to take the address of a macro :)
+
+// On linux we have a weird situation. The stderr/out/in symbols
are both
+// macros and global variables because of standards requirements.
So, we
+// boldly use the EXPLICIT_SYMBOL macro without checking for a
#define first.
+#if defined(__linux__)
+ {
+ EXPLICIT_SYMBOL(stderr);
+ EXPLICIT_SYMBOL(stdout);
+ EXPLICIT_SYMBOL(stdin);
+ }
+#else
+ // For everything else, we want to check to make sure the symbol
isn't defined
+ // as a macro before using EXPLICIT_SYMBOL.
{
#ifndef stdin
EXPLICIT_SYMBOL(stdin);
@@ -179,7 +191,11 @@
#ifndef stderr
EXPLICIT_SYMBOL(stderr);
#endif
+#ifndef errno
+ EXPLICIT_SYMBOL(errno);
+#endif
}
+#endif
#undef EXPLICIT_SYMBOL
return 0;
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