4 files changed, 12 insertions, 4 deletions
diff --git a/src/extract/cut b/src/extract/cut
index fa6cb99..7399b7f 100755
--- a/src/extract/cut
+++ b/src/extract/cut
@@ -36,7 +36,7 @@ while i < n:
         delimiter = sys.argv[i]
     elif arg == '-f':
         i += 1
-        fields += [int(f) for f in sys.argv[i].split(',')]
+        fields += [int(f) - 1 for f in sys.argv[i].split(',')]
     elif arg == '--complement':
         complement = True
     i += 1
@@ -47,7 +47,7 @@ fields = set(fields)
 
 def modify(line):
     line = line.split(delimiter)
-    if not complement:
+    if complement:
         line = [line[i] for i in range(len(line)) if i not in fields]
     else:
         line = [line[i] for i in range(len(line)) if i in fields]
diff --git a/src/lib/gamma-helper.c b/src/lib/gamma-helper.c
index 45a38b5..d30e5ab 100644
--- a/src/lib/gamma-helper.c
+++ b/src/lib/gamma-helper.c
@@ -55,7 +55,7 @@ static inline uint64_t float_to_64(float value)
 {
   /* XXX Which is faster? */
   
-#ifdef __GCC__
+#ifdef HAVE_INT128
   /* `__int128` is a GNU C extension, which
      (because it is not ISO C) emits a warning
      under -pedantic. */
@@ -121,7 +121,7 @@ static inline uint64_t double_to_64(double value)
 {
   /* XXX Which is faster? */
   
-#ifdef __GCC__
+#ifdef HAVE_INT128
   /* `__int128` is a GNU C extension, which
      (because it is not ISO C) emits a warning
      under -pedantic. */
diff --git a/src/lib/libgamma-error.c.gpp b/src/lib/libgamma-error.c.gpp
index 0378f57..717f11b 100644
--- a/src/lib/libgamma-error.c.gpp
+++ b/src/lib/libgamma-error.c.gpp
@@ -37,7 +37,11 @@ $>export PATH=".:${PATH}"
  * Group that the user needs to be a member of if
  * `LIBGAMMA_DEVICE_REQUIRE_GROUP` is returned.
  */
+#ifndef __WIN32__
 gid_t libgamma_group_gid = 0;
+#else
+short libgamma_group_gid = 0;
+#endif
 
 /**
  * Group that the user needs to be a member of if
diff --git a/src/lib/libgamma-error.h b/src/lib/libgamma-error.h
index d11dbc1..419985f 100644
--- a/src/lib/libgamma-error.h
+++ b/src/lib/libgamma-error.h
@@ -34,7 +34,11 @@
  * Group that the user needs to be a member of if
  * `LIBGAMMA_DEVICE_REQUIRE_GROUP` is returned.
  */
+#ifndef __WIN32__
 extern gid_t libgamma_group_gid;
+#else
+extern short libgamma_group_gid;
+#endif
 
 /**
  * Group that the user needs to be a member of if