sys-devel/bmake: Fix compilation warnings

Closes: https://bugs.gentoo.org/841362
Signed-off-by: Jakov Smolić <jsmolic@gentoo.org>

sys-devel/bmake/bmake-20220418.ebuild

@@ -17,7 +17,10 @@ SLOT="0"
 KEYWORDS="~amd64 ~ppc ~x86"
 
 # Skip failing test (sandbox and csh)
-PATCHES=( "${FILESDIR}"/${PN}-20210206-tests.patch )
+PATCHES=(
+	"${FILESDIR}"/${PN}-20210206-tests.patch
+	"${FILESDIR}"/${PN}-20220418-warnings.patch
+)
 
 src_prepare() {
 	default

sys-devel/bmake/files/bmake-20220418-warnings.patch

@@ -0,0 +1,38 @@
+# https://bugs.gentoo.org/841362
+#
+# Fix -Wimplicit-function-declaration and -Wunused-result warnings
+#
+# meta.c: In function ‘meta_name’:
+# meta.c:262:21: warning: implicit declaration of function ‘strlcpy’; did you mean ‘strncpy’? [-Wimplicit-function-declaration]
+#   262 |                     strlcpy(rp, tname_base, sizeof buf - (size_t)(rp - buf));
+#       |                     ^~~~~~~
+#       |                     strncpy
+#
+# meta.c: In function ‘meta_job_error’:
+# meta.c:774:5: warning: ignoring return value of ‘getcwd’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
+#   774 |     getcwd(cwd, sizeof cwd);
+#       |     ^~~~~~~~~~~~~~~~~~~~~~~
+
+--- a/meta.c
++++ b/meta.c
+@@ -106,6 +106,10 @@
+ char * stresep(char **, const char *, int);
+ #endif
+ 
++#if !defined(HAVE_STRLCPY)
++size_t strlcpy(char *, const char *, size_t);
++#endif
++
+ /*
+  * Filemon is a kernel module which snoops certain syscalls.
+  *
+@@ -769,7 +773,8 @@
+     }
+     if (gn != NULL)
+ 	Global_Set(".ERROR_TARGET", GNode_Path(gn));
+-    getcwd(cwd, sizeof cwd);
++    if (getcwd(cwd, sizeof cwd) == NULL)
++    	err(1, "Could not get current working directory");
+     Global_Set(".ERROR_CWD", cwd);
+     if (pbm->meta_fname[0] != '\0') {
+ 	Global_Set(".ERROR_META_FILE", pbm->meta_fname);