Todd Fiala 9cd9208565 Fix configure to find arc4random via header files. ... ISSUE: On Ubuntu 12.04 LTS, arc4random is provided by libbsd.so, which is a transitive dependency of libedit. If a system had libedit on it that was implemented in terms of libbsd.so, then the arc4random test, previously implemented as a linker test, would succeed with -ledit. However, on Ubuntu this would also require a #include <bsd/stdlib.h>. This caused a build breakage on configure-based Ubuntu 12.04 with libedit installed. FIX: This fix changes configure to test for arc4random by searching for it in the standard header files. On Ubuntu 12.04, this test now properly fails to find arc4random as it is not defined in the default header locations. It also tweaks the #define names to match the output of the header check command, which is slightly different than the linker function check #defines. I tested the following scenarios: (1) Ubuntu 12.04 without the libedit package [did not find arc4random, as expected] (2) Ubuntu 12.04 with libedit package [properly did not find arc4random, as expected] (3) Ubuntu 12.04 with most recent libedit, custom built, and not dependent on libbsd.so [properly did not find arc4random, as expected]. (4) FreeBSD 10.0B1 [properly found arc4random, as expected] git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200819 91177308-0d34-0410-b5e6-96231b3b80d8		2014-02-05 05:04:36 +00:00
..
Analysis	cleanup: scc_iterator consumers should use isAtEnd	2014-02-04 19:19:07 +00:00
AsmParser	[ms-cxxabi] Add a new calling convention that swaps 'this' and 'sret'	2014-01-31 17:41:22 +00:00
Bitcode
CodeGen	Use the default values.	2014-02-04 18:34:04 +00:00
DebugInfo	Simplify the handling of iterators in ObjectFile.	2014-01-30 02:49:50 +00:00
ExecutionEngine	Simplify getSymbolFlags.	2014-01-31 20:57:12 +00:00
IR	Fix wording of warning message about invalid debug info.	2014-02-04 23:49:02 +00:00
IRReader
LineEditor	Avoid using EL_GETFP.	2014-02-04 20:04:46 +00:00
Linker
LTO	Change MCStreamer EmitInstruction interface to take subtarget info	2014-01-28 23:12:42 +00:00
MC	Every target uses .align. Simplify.	2014-02-04 18:39:51 +00:00
Object	Remove unused SF_ThreadLocal.	2014-02-04 22:50:47 +00:00
Option
Support	Fix configure to find arc4random via header files.	2014-02-05 05:04:36 +00:00
TableGen
Target	SimplifyLibCalls: Push TLI through the exp2->ldexp transform.	2014-02-04 20:27:23 +00:00
Transforms	SimplifyLibCalls: Push TLI through the exp2->ldexp transform.	2014-02-04 20:27:23 +00:00
CMakeLists.txt	Introduce line editor library.	2014-01-31 23:46:14 +00:00
LLVMBuild.txt	Introduce line editor library.	2014-01-31 23:46:14 +00:00
Makefile	Introduce line editor library.	2014-01-31 23:46:14 +00:00