https://cvsweb.bsd.lv/mandoc/compat_reallocarray.c.diff?r1=1.4&r2=1.5
https://cvsweb.bsd.lv/mandoc/compat_getline.c.diff?r1=text&tr1=1.1&r2=text&tr2=1.2

https://bugs.gentoo.org/707254
--- mandoc/compat_reallocarray.c	2014/12/11 09:05:01	1.4
+++ mandoc/compat_reallocarray.c	2020/06/15 01:37:15	1.5
@@ -1,8 +1,0 @@
-#include "config.h"
-
-#if HAVE_REALLOCARRAY
-
-int dummy;
-
-#else
-
@@ -23,6 +15,7 @@ int dummy;
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
+#include "config.h"
 
 #include <sys/types.h>
 #include <errno.h>
@@ -45,5 +38,3 @@ reallocarray(void *optr, size_t nmemb, size_t size)
 	}
 	return realloc(optr, size * nmemb);
 }
-
-#endif /*!HAVE_REALLOCARRAY*/
--- mandoc/compat_getline.c	2015/11/07 20:52:52	1.1
+++ mandoc/compat_getline.c	2020/06/15 01:37:14	1.2
@@ -1,8 +1,0 @@
-#include "config.h"
-
-#if HAVE_GETLINE
-
-int dummy;
-
-#else
-
@@ -22,6 +14,7 @@ int dummy;
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
+#include "config.h"
 
 #include <sys/types.h>
 #include <errno.h>
@@ -64,5 +57,3 @@ getline(char **buf, size_t *bufsz, FILE *fp)
 			return pos;
 	}
 }
-
-#endif