#277 #318 Support all same-directory includes for gcc and clang

ale_linters/c/clang.vim

@@ -9,12 +9,18 @@ if !exists('g:ale_c_clang_options')
     let g:ale_c_clang_options = '-std=c11 -Wall'
 endif
 
+function! ale_linters#c#clang#GetCommand(buffer) abort
+    " -iquote with the directory the file is in makes #include work for
+    "  headers in the same directory.
+    return 'clang -S -x c -fsyntax-only '
+    \   . '-iquote ' . fnameescape(fnamemodify(bufname(a:buffer), ':p:h'))
+    \   . ' ' . g:ale_c_clang_options . ' -'
+endfunction
+
 call ale#linter#Define('c', {
 \   'name': 'clang',
 \   'output_stream': 'stderr',
 \   'executable': 'clang',
-\   'command': 'clang -S -x c -fsyntax-only '
-\       . g:ale_c_clang_options
-\       . ' -',
+\   'command_callback': 'ale_linters#c#clang#GetCommand',
 \   'callback': 'ale#handlers#HandleGCCFormat',
 \})

ale_linters/c/gcc.vim

@@ -10,9 +10,11 @@ if !exists('g:ale_c_gcc_options')
 endif
 
 function! ale_linters#c#gcc#GetCommand(buffer) abort
+    " -iquote with the directory the file is in makes #include work for
+    "  headers in the same directory.
     return 'gcc -S -x c -fsyntax-only '
-    \      . g:ale_c_gcc_options . ' -'
-
+    \   . '-iquote ' . fnameescape(fnamemodify(bufname(a:buffer), ':p:h'))
+    \   . ' ' . g:ale_c_gcc_options . ' -'
 endfunction
 
 call ale#linter#Define('c', {

ale_linters/cpp/clang.vim

@@ -6,12 +6,18 @@ if !exists('g:ale_cpp_clang_options')
     let g:ale_cpp_clang_options = '-std=c++14 -Wall'
 endif
 
+function! ale_linters#cpp#clang#GetCommand(buffer) abort
+    " -iquote with the directory the file is in makes #include work for
+    "  headers in the same directory.
+    return 'clang++ -S -x c++ -fsyntax-only '
+    \   . '-iquote ' . fnameescape(fnamemodify(bufname(a:buffer), ':p:h'))
+    \   . ' ' . g:ale_cpp_clang_options . ' -'
+endfunction
+
 call ale#linter#Define('cpp', {
 \   'name': 'clang',
 \   'output_stream': 'stderr',
 \   'executable': 'clang++',
-\   'command': 'clang++ -S -x c++ -fsyntax-only '
-\       . g:ale_cpp_clang_options
-\       . ' -',
+\   'command_callback': 'ale_linters#cpp#clang#GetCommand',
 \   'callback': 'ale#handlers#HandleGCCFormat',
 \})

ale_linters/cpp/gcc.vim

@@ -16,9 +16,11 @@ if !exists('g:ale_cpp_gcc_options')
 endif
 
 function! ale_linters#cpp#gcc#GetCommand(buffer) abort
+    " -iquote with the directory the file is in makes #include work for
+    "  headers in the same directory.
     return 'gcc -S -x c++ -fsyntax-only '
-    \      . g:ale_cpp_gcc_options . ' -'
-
+    \   . '-iquote ' . fnameescape(fnamemodify(bufname(a:buffer), ':p:h'))
+    \   . ' ' . g:ale_cpp_gcc_options . ' -'
 endfunction
 
 call ale#linter#Define('cpp', {