[LLVMbugs] [Bug 15996] New: configure: error: Type int64_t required but not found

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=15996

            Bug ID: 15996
           Summary: configure: error: Type int64_t required but not found
           Product: Build scripts
           Version: 3.1
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: autoconf
          Assignee: unassignedbugs at nondot.org
          Reporter: manishps824 at gmail.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

I am trying build llvm in the source directory itself. I have tar file for
version 3.1.
I get a number of warnings on configuring and finally an error.
Sample of a warning:
---------------------------------------
configure: WARNING: fenv.h: present but cannot be compiled
configure: WARNING: fenv.h:     check for missing prerequisite headers?
configure: WARNING: fenv.h: see the Autoconf documentation
configure: WARNING: fenv.h:     section "Present But Cannot Be Compiled"
configure: WARNING: fenv.h: proceeding with the preprocessor's result
configure: WARNING: fenv.h: in the future, the compiler will take precedence
configure: WARNING:     ## ------------------------------------ ##
configure: WARNING:     ## Report this to http://llvm.org/bugs/ ##
configure: WARNING:     ## ------------------------------------ ##
---------------------------------------

The error is as follows:
-----------------------------------------------
configure: error: Type int64_t required but not found
-----------------------------------------------

I have used the same source to build llvm earlier and it worked fine. But now i
get an error.

What might be the issue?

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