diff --git a/meson.build b/meson.build
index e938537..6c77471 100644
--- a/meson.build
+++ b/meson.build
@@ -26,5 +26,35 @@ endif
 
 glib_dep = dependency('glib-2.0', version: glib_req, required: false)
 
+thread_dep = dependency('threads', required: false)
+
+# Check if functions exist
+
+config = configuration_data()
+
+functions = {
+    'fseeko': 'stdio.h',
+    'realpath': 'stdlib.h',
+}
+
+foreach function, include_file : functions
+    exists = cc.has_function(
+        function,
+        args: '-D_GNU_SOURCE',
+        prefix: '#include <@0@>'.format(include_file),
+    )
+    config.set('HAVE_' + function.to_upper(), exists)
+endforeach
+
+# Generate config.h
+
+config.set('FST_WRITER_PARALLEL', thread_dep.found())
+config.set('HAVE_LIBPTHREAD', thread_dep.found())
+
+configure_file(output: 'config.h', configuration: config)
+config_inc = include_directories('.')
+
+add_project_arguments('-DFST_INCLUDE_CONFIG', language: 'c')
+
 subdir('src')
 subdir('tests')
\ No newline at end of file
diff --git a/src/fstapi.c b/src/fstapi.c
index 197b907..465845d 100644
--- a/src/fstapi.c
+++ b/src/fstapi.c
@@ -37,10 +37,9 @@
  *
  */
 
-// #ifndef FST_CONFIG_INCLUDE
-// # define FST_CONFIG_INCLUDE <config.h>
-// #endif
-// #include FST_CONFIG_INCLUDE
+#ifdef FST_INCLUDE_CONFIG
+#include <config.h>
+#endif
 
 #include "fstapi.h"
 #include "fastlz.h"
@@ -60,21 +59,6 @@
 #include <windows.h>
 #endif
 
-#ifdef HAVE_ALLOCA_H
-#include <alloca.h>
-#elif defined(__GNUC__)
-#ifndef __MINGW32__
-#ifndef alloca
-#define alloca __builtin_alloca
-#endif
-#else
-#include <malloc.h>
-#endif
-#elif defined(_MSC_VER)
-#include <malloc.h>
-#define alloca _alloca
-#endif
-
 #ifndef PATH_MAX
 #define PATH_MAX (4096)
 #endif
@@ -1748,8 +1732,9 @@ static void fstWriterFlushContextPrivate(fstWriterContext *xc)
 }
 
 #ifdef FST_WRITER_PARALLEL
-static void *fstWriterFlushContextPrivate1(fstWriterContext *xc)
+static void *fstWriterFlushContextPrivate1(void *ctx)
 {
+    struct fstWriterContext *xc = (struct fstWriterContext *)ctx;
     struct fstWriterContext *xc_parent;
 
     pthread_mutex_lock(&(xc->xc_parent->mutex));
@@ -5964,7 +5949,10 @@ static char *fstExtractRvatDataFromFrame(fstReaderContext *xc, fstHandle facidx,
     return (buf);
 }
 
-char *fstReaderGetValueFromHandleAtTime(fstReaderContext *xc, uint64_t tim, fstHandle facidx, char *buf)
+char *fstReaderGetValueFromHandleAtTime(fstReaderContext *xc,
+                                        uint64_t tim,
+                                        fstHandle facidx,
+                                        char *buf)
 {
     fst_off_t blkpos = 0, prev_blkpos;
     uint64_t beg_tim, end_tim, beg_tim2, end_tim2;
diff --git a/src/meson.build b/src/meson.build
index 208ba85..1987fa5 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -11,7 +11,7 @@ libfst_headers = [
 libfst_dependencies = [
     zlib_dep,
     bzip2_dep,
-    # thread_dep,
+    thread_dep,
 ]
 
 libfst = library(
@@ -20,6 +20,7 @@ libfst = library(
     dependencies: libfst_dependencies,
     version: meson.project_version(),
     install: true,
+    include_directories: config_inc,
 )
 
 libfst_dep = declare_dependency(