move cpp17 fix to a patch

recipes/gperf/all/conanfile.py

@@ -11,6 +11,7 @@ class GperfConan(ConanFile):
     settings = "os", "arch", "compiler"
     _source_subfolder = "source_subfolder"
     _autotools = None
+    exports_sources = "patches/**"
 
     @property
     def _is_msvc(self):
@@ -59,11 +60,6 @@ def _build_configure(self):
             autotools.make()
 
     def build(self):
-        if tools.valid_min_cppstd(self, "17"):
-            tools.replace_in_file(os.path.join(self._source_subfolder, "lib", "getline.cc"),
-                                  "register int c = getc (stream);",
-                                  "int c = getc (stream);")
-
         if self._is_msvc:
             with tools.vcvars(self.settings):
                 self._build_configure()

recipes/gperf/all/patches/remove-register-keyword.patch

@@ -0,0 +1,13 @@
+diff --git a/lib/getline.cc b/lib/getline.cc
+index ecc3e85..2d97644 100644 (file)
+--- a/lib/getline.cc
++++ b/lib/getline.cc
+@@ -55,7 +55,7 @@ getstr (char **lineptr, size_t *n, FILE *stream, char terminator, size_t offset)
+
+   for (;;)
+     {
+-      register int c = getc (stream);
++      int c = getc (stream);
+
+       /* We always want at least one char left in the buffer, since we
+          always (unless we get an error while reading the first char)