[LLVMbugs] [Bug 21215] New: Include path argument should be redundant if -fmodule-map-file is specified

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=21215

            Bug ID: 21215
           Summary: Include path argument should be redundant if
                    -fmodule-map-file is specified
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Modules
          Assignee: unassignedclangbugs at nondot.org
          Reporter: steveire at gmail.com
                CC: dgregor at apple.com, llvmbugs at cs.uiuc.edu
    Classification: Unclassified

The module-map-file, if specified, specifies the location of header files which
might be searched for. Currently an additional -I include/path must be
redundantly specified:


$ cat test.cpp 

#include "foo.h"

int main(int, char **) {

  return 0;
}

$ clang++ -E -fmodules -fmodule-map-file=include/foo.map test.cpp 
# 1 "test.cpp"
# 1 "<built-in>" 1
# 1 "<built-in>" 3
# 318 "<built-in>" 3
# 1 "<command line>" 1
# 1 "<built-in>" 2
# 1 "test.cpp" 2
test.cpp:2:10: fatal error: 'foo.h' file not found
#include "foo.h"
         ^



int main(int, char **) {

  return 0;
}
1 error generated.

$ cat include/foo.map 
module foo {
  requires cplusplus
  header "foo.h"
}

$ clang++ -E -fmodules -fmodule-map-file=include/foo.map -I include test.cpp 
# 1 "test.cpp"
# 1 "<built-in>" 1
# 1 "<built-in>" 3
# 318 "<built-in>" 3
# 1 "<command line>" 1
# 1 "<built-in>" 2
# 1 "test.cpp" 2

@import foo; /* clang -E: implicit import for
"/home/stephen/safe/dev/playground/modules/modulestry/include/foo.h" */

int main(int, char **) {

  return 0;
}

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