Index: vim-syntastic-3.7.0/autoload/syntastic/c.vim
===================================================================
--- vim-syntastic-3.7.0.orig/autoload/syntastic/c.vim
+++ vim-syntastic-3.7.0/autoload/syntastic/c.vim
@@ -228,7 +228,7 @@ function! s:_get_cflags(ft, ck, opts) ab
     endif
 
     " add optional config file parameters
-    let config_file = s:_get_checker_var('g', a:ft, a:ck, 'config_file', '.syntastic_' . a:ft . '_config')
+    let config_file = s:_get_checker_var('b', a:ft, a:ck, 'config_file', s:_get_checker_var('g', a:ft, a:ck, 'config_file', ''))
     let flags .= ' ' . syntastic#c#ReadConfig(config_file)
 
     if b_cflags ==# '' && (a:ft ==# 'c' || a:ft ==# 'cpp') && !s:_get_checker_var('g', a:ft, a:ck, 'no_include_search', 0)
Index: vim-syntastic-3.7.0/syntax_checkers/c/avrgcc.vim
===================================================================
--- vim-syntastic-3.7.0.orig/syntax_checkers/c/avrgcc.vim
+++ vim-syntastic-3.7.0/syntax_checkers/c/avrgcc.vim
@@ -15,16 +15,14 @@ if exists('g:loaded_syntastic_c_avrgcc_c
 endif
 let g:loaded_syntastic_c_avrgcc_checker = 1
 
-if !exists('g:syntastic_avrgcc_config_file')
-    let g:syntastic_avrgcc_config_file = '.syntastic_avrgcc_config'
-endif
-
 let s:save_cpo = &cpo
 set cpo&vim
 
 function! SyntaxCheckers_c_avrgcc_GetLocList() dict
+    let buf = bufnr('')
+
     let makeprg = self.makeprgBuild({
-        \ 'args_before': syntastic#c#ReadConfig(g:syntastic_avrgcc_config_file),
+        \ 'args_before': syntastic#c#ReadConfig(syntastic#util#bufVar(buf, 'avrgcc_config_file')),
         \ 'args_after': '-x c -fsyntax-only' })
 
     let errorformat =
Index: vim-syntastic-3.7.0/syntax_checkers/c/clang_check.vim
===================================================================
--- vim-syntastic-3.7.0.orig/syntax_checkers/c/clang_check.vim
+++ vim-syntastic-3.7.0/syntax_checkers/c/clang_check.vim
@@ -14,10 +14,6 @@ if exists('g:loaded_syntastic_c_clang_ch
 endif
 let g:loaded_syntastic_c_clang_check_checker = 1
 
-if !exists('g:syntastic_clang_check_config_file')
-    let g:syntastic_clang_check_config_file = '.syntastic_clang_check_config'
-endif
-
 if !exists('g:syntastic_c_clang_check_sort')
     let g:syntastic_c_clang_check_sort = 1
 endif
@@ -26,10 +22,12 @@ let s:save_cpo = &cpo
 set cpo&vim
 
 function! SyntaxCheckers_c_clang_check_GetLocList() dict
+    let buf = bufnr('')
+
     let makeprg = self.makeprgBuild({
         \ 'post_args':
         \   '-- ' .
-        \   syntastic#c#ReadConfig(g:syntastic_clang_check_config_file) . ' ' .
+        \   syntastic#c#ReadConfig(syntastic#util#bufVar(buf, 'clang_check_config_file')) . ' ' .
         \   '-fshow-column ' .
         \   '-fshow-source-location ' .
         \   '-fno-caret-diagnostics ' .
Index: vim-syntastic-3.7.0/syntax_checkers/c/clang_tidy.vim
===================================================================
--- vim-syntastic-3.7.0.orig/syntax_checkers/c/clang_tidy.vim
+++ vim-syntastic-3.7.0/syntax_checkers/c/clang_tidy.vim
@@ -14,10 +14,6 @@ if exists('g:loaded_syntastic_c_clang_ti
 endif
 let g:loaded_syntastic_c_clang_tidy_checker = 1
 
-if !exists('g:syntastic_clang_tidy_config_file')
-    let g:syntastic_clang_tidy_config_file = '.syntastic_clang_tidy_config'
-endif
-
 if !exists('g:syntastic_c_clang_tidy_sort')
     let g:syntastic_c_clang_tidy_sort = 1
 endif
@@ -26,10 +22,12 @@ let s:save_cpo = &cpo
 set cpo&vim
 
 function! SyntaxCheckers_c_clang_tidy_GetLocList() dict
+    let buf = bufnr('')
+
     let makeprg = self.makeprgBuild({
         \ 'post_args':
         \   '-- ' .
-        \   syntastic#c#ReadConfig(g:syntastic_clang_tidy_config_file) . ' ' .
+        \   syntastic#c#ReadConfig(syntastic#util#bufVar(buf, 'clang_tidy_config_file')) . ' ' .
         \   '-fshow-column ' .
         \   '-fshow-source-location ' .
         \   '-fno-caret-diagnostics ' .
Index: vim-syntastic-3.7.0/syntax_checkers/c/cppcheck.vim
===================================================================
--- vim-syntastic-3.7.0.orig/syntax_checkers/c/cppcheck.vim
+++ vim-syntastic-3.7.0/syntax_checkers/c/cppcheck.vim
@@ -14,16 +14,14 @@ if exists('g:loaded_syntastic_c_cppcheck
 endif
 let g:loaded_syntastic_c_cppcheck_checker = 1
 
-if !exists('g:syntastic_cppcheck_config_file')
-    let g:syntastic_cppcheck_config_file = '.syntastic_cppcheck_config'
-endif
-
 let s:save_cpo = &cpo
 set cpo&vim
 
 function! SyntaxCheckers_c_cppcheck_GetLocList() dict
+    let buf = bufnr('')
+
     let makeprg = self.makeprgBuild({
-        \ 'args': syntastic#c#ReadConfig(g:syntastic_cppcheck_config_file),
+        \ 'args': syntastic#c#ReadConfig(syntastic#util#bufVar(buf, 'cppcheck_config_file')),
         \ 'args_after': '-q --enable=style' })
 
     let errorformat =
Index: vim-syntastic-3.7.0/syntax_checkers/c/oclint.vim
===================================================================
--- vim-syntastic-3.7.0.orig/syntax_checkers/c/oclint.vim
+++ vim-syntastic-3.7.0/syntax_checkers/c/oclint.vim
@@ -14,10 +14,6 @@ if exists('g:loaded_syntastic_c_oclint_c
 endif
 let g:loaded_syntastic_c_oclint_checker = 1
 
-if !exists('g:syntastic_oclint_config_file')
-    let g:syntastic_oclint_config_file = '.syntastic_oclint_config'
-endif
-
 if !exists('g:syntastic_c_oclint_sort')
     let g:syntastic_c_oclint_sort = 1
 endif
@@ -26,8 +22,10 @@ let s:save_cpo = &cpo
 set cpo&vim
 
 function! SyntaxCheckers_c_oclint_GetLocList() dict
+    let buf = bufnr('')
+
     let makeprg = self.makeprgBuild({
-        \ 'post_args': '-- -c ' . syntastic#c#ReadConfig(g:syntastic_oclint_config_file) })
+        \ 'post_args': '-- -c ' . syntastic#c#ReadConfig(syntastic#util#bufVar(buf, 'oclint_config_file') })
 
     let errorformat =
         \ '%E%f:%l:%c: fatal error: %m,' .
Index: vim-syntastic-3.7.0/syntax_checkers/c/pc_lint.vim
===================================================================
--- vim-syntastic-3.7.0.orig/syntax_checkers/c/pc_lint.vim
+++ vim-syntastic-3.7.0/syntax_checkers/c/pc_lint.vim
@@ -18,12 +18,9 @@ let g:loaded_syntastic_c_pc_lint_checker
 let s:save_cpo = &cpo
 set cpo&vim
 
-if !exists('g:syntastic_pc_lint_config_file')
-    let g:syntastic_pc_lint_config_file = 'options.lnt'
-endif
-
 function! SyntaxCheckers_c_pc_lint_GetLocList() dict
-    let config = syntastic#util#findFileInParent(g:syntastic_pc_lint_config_file, expand('%:p:h', 1))
+    let buf = bufnr('')
+    let config = syntastic#util#findFileInParent(syntastic#util#bufVar(buf, 'pc_lint_config_file'), fnamemodify(bufname(buf), ':p:h'))
     call self.log('config =', config)
 
     " -hFs1         - show filename, add space after messages, try to make message 1 line
Index: vim-syntastic-3.7.0/syntax_checkers/c/sparse.vim
===================================================================
--- vim-syntastic-3.7.0.orig/syntax_checkers/c/sparse.vim
+++ vim-syntastic-3.7.0/syntax_checkers/c/sparse.vim
@@ -14,16 +14,14 @@ if exists('g:loaded_syntastic_c_sparse_c
 endif
 let g:loaded_syntastic_c_sparse_checker = 1
 
-if !exists('g:syntastic_sparse_config_file')
-    let g:syntastic_sparse_config_file = '.syntastic_sparse_config'
-endif
-
 let s:save_cpo = &cpo
 set cpo&vim
 
 function! SyntaxCheckers_c_sparse_GetLocList() dict
+    let buf = bufnr('')
+
     let makeprg = self.makeprgBuild({
-        \ 'args': syntastic#c#ReadConfig(g:syntastic_sparse_config_file),
+        \ 'args': syntastic#c#ReadConfig(syntastic#util#bufVar(buf, 'sparse_config_file')),
         \ 'args_after': '-ftabstop=' . &ts })
 
     let errorformat =
Index: vim-syntastic-3.7.0/syntax_checkers/c/splint.vim
===================================================================
--- vim-syntastic-3.7.0.orig/syntax_checkers/c/splint.vim
+++ vim-syntastic-3.7.0/syntax_checkers/c/splint.vim
@@ -14,16 +14,14 @@ if exists('g:loaded_syntastic_c_splint_c
 endif
 let g:loaded_syntastic_c_splint_checker = 1
 
-if !exists('g:syntastic_splint_config_file')
-    let g:syntastic_splint_config_file = '.syntastic_splint_config'
-endif
-
 let s:save_cpo = &cpo
 set cpo&vim
 
 function! SyntaxCheckers_c_splint_GetLocList() dict
+    let buf = bufnr('')
+
     let makeprg = self.makeprgBuild({
-        \ 'args': syntastic#c#ReadConfig(g:syntastic_splint_config_file),
+        \ 'args': syntastic#c#ReadConfig(syntastic#util#bufVar(buf, 'splint_config_file')),
         \ 'args_after': '-showfunc -hints +quiet' })
 
     let errorformat =
Index: vim-syntastic-3.7.0/syntax_checkers/cpp/verapp.vim
===================================================================
--- vim-syntastic-3.7.0.orig/syntax_checkers/cpp/verapp.vim
+++ vim-syntastic-3.7.0/syntax_checkers/cpp/verapp.vim
@@ -16,16 +16,14 @@ if exists('g:loaded_syntastic_cpp_verapp
 endif
 let g:loaded_syntastic_cpp_verapp_checker = 1
 
-if !exists('g:syntastic_verapp_config_file')
-    let g:syntastic_verapp_config_file = '.syntastic_verapp_config'
-endif
-
 let s:save_cpo = &cpo
 set cpo&vim
 
 function! SyntaxCheckers_cpp_verapp_GetLocList() dict
+    let buf = bufnr('')
+
     let makeprg = self.makeprgBuild({
-        \ 'args': syntastic#c#ReadConfig(g:syntastic_verapp_config_file),
+        \ 'args': syntastic#c#ReadConfig(syntastic#util#bufVar(buf, 'verapp_config_file')),
         \ 'args_after': '--show-rule --no-duplicate -S -c -' })
 
     let errorformat = '%f:%t:%l:%c:%m'
Index: vim-syntastic-3.7.0/autoload/syntastic/util.vim
===================================================================
--- vim-syntastic-3.7.0.orig/autoload/syntastic/util.vim
+++ vim-syntastic-3.7.0/autoload/syntastic/util.vim
@@ -107,6 +107,10 @@ function! syntastic#util#rmrf(what) abor
     endif
 endfunction " }}}2
 
+function! syntastic#util#getbufvar(buf, name, ...) abort " {{{2
+    return a:0 ? s:_getbufvar(a:buf, a:name, a:1) : getbufvar(a:buf, a:name)
+endfunction " }}}2
+
 " Search the first 5 lines of the file for a magic number and return a map
 " containing the args and the executable
 "
@@ -131,12 +135,24 @@ function! syntastic#util#parseShebang()
     return { 'exe': '', 'args': [] }
 endfunction " }}}2
 
-" Get the value of a variable.  Allow local variables to override global ones.
+" Get the value of a Vim variable.  Allow buffer variables to override global ones.
+function! syntastic#util#bufRawVar(buf, name, ...) abort " {{{2
+    return s:_getbufvar(a:buf, a:name, get(g:, a:name, a:0 ? a:1 : ''))
+endfunction "}}}2
+
+" Get the value of a syntastic variable.  Allow buffer variables to override global ones.
+function! syntastic#util#bufVar(buf, name, ...) abort " {{{2
+    return call('syntastic#util#bufRawVar', [a:buf, 'syntastic_' . a:name] + a:000)
+endfunction "}}}2
+
+" Get the value of a Vim variable.  Allow local variables to override global ones.
+function! syntastic#util#rawVar(name, ...) abort " {{{2
+    return get(b:, a:name, get(g:, a:name, a:0 ? a:1 : ''))
+endfunction " }}}2
+
+" Get the value of a syntastic variable.  Allow local variables to override global ones.
 function! syntastic#util#var(name, ...) abort " {{{2
-    return
-        \ exists('b:syntastic_' . a:name) ? b:syntastic_{a:name} :
-        \ exists('g:syntastic_' . a:name) ? g:syntastic_{a:name} :
-        \ a:0 > 0 ? a:1 : ''
+    return call('syntastic#util#rawVar', ['syntastic_' . a:name] + a:000)
 endfunction " }}}2
 
 " Parse a version string.  Return an array of version components.
@@ -486,6 +502,18 @@ function! s:_float2str_smart(val) abort
     return printf('%.1f', a:val)
 endfunction " }}}2
 
+function! s:_getbufvar_dumb(buf, name, ...) abort " {{{2
+    let ret = getbufvar(a:buf, a:name)
+    if a:0 && type(ret) == type('') && ret ==# ''
+        unlet! ret
+        let ret = a:1
+    endif
+    return ret
+endfunction "}}}2
+
+let s:_getbufvar = function(v:version > 703 || (v:version == 703 && has('patch831')) ? 'getbufvar' : 's:_getbufvar_dumb')
+lockvar s:_getbufvar
+
 function! s:_float2str_dumb(val) abort " {{{2
     return a:val
 endfunction " }}}2