http://llvm.org/bugs/show_bug.cgi?id=19390
Bug ID: 19390
Summary: [windows] Cmake llvm build of MinGW under Cygwin
fails: Posix filesystem calls.
Product: new-bugs
Version: trunk
Hardware: PC
OS: Windows 2000
Status: NEW
Severity: normal
Priority: P
Component: new bugs
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
A CMake build using MinGW under CYGWIN fails in FileSystem.h. This is due to
the LLVM source code using Posix filesystem calls when LLVM_ON_UNIX is true.
Since MinGW can be used on both Cygwin/Unix, and Windows there is a conflict.
LLVM assumes that LLVM_ON_UNIX means that all posix filesystem calls are
present.
Since Mingw doesn't support posix filesystem calls, the build breaks early in:
include/llvm/Support/FileSystem.h
The information to identify this case is in CMakeCCompiler.cmake.
The final definition of the flags is in LLVMConfig.cmake
set(LLVM_ON_UNIX 1)
set(LLVM_ON_WIN32 0)
For MinGW, LLVM_ON_UNIX must be false and LLVM_ON_WIN32 must be true.
Linux or Windows is not quite correct for this case. A new HAVE_POSIX,
segragating the filesystem headers and api's would be more correct. This is a
bit more extensive involving source code, cmake build, and autoconf build.
Since mingw current builds with LLVM_ON_WIN32 set this way, the trivial change
should work.
The Host and Compiler information regarding Cygwin and MinGW are all present in
CMakeCCompiler.cmake for a starting point.
The variables needed by the build are set in LLVMConfig.cmake.
--
You are receiving this mail because:
You are on the CC list for the bug.
_______________________________________________
LLVMbugs mailing list
[email protected]
http://lists.cs.uiuc.edu/mailman/listinfo/llvmbugs
