libroot: Add fake libc static library

* It's specified in POSIX: https://pubs.opengroup.org/onlinepubs/9699919799/utilities/c99.html
* wine hardcodes a -lc in its winegcc compiler

Change-Id: I592b62085787d8f1a1ead2df32e978a91ab03ea9
Reviewed-on: https://review.haiku-os.org/c/haiku/+/3086
Reviewed-by: Adrien Destugues <[email protected]>

build/jam/packages/HaikuDevel

@@ -39,7 +39,7 @@ for lib in [ HaikuImageGetSystemLibs ] $(developmentLibs) {
 
 # static libraries
 AddFilesToPackage develop lib :
-	libcolumnlistview.a
+	libc.a libcolumnlistview.a
 	<$(architecture)>liblocalestub.a
 	libm.a libpthread.a
 	libprint.a libprintutils.a

build/jam/packages/HaikuDevelSecondary

@@ -34,6 +34,7 @@ for lib in [ HaikuImageGetSystemLibs ] $(developmentLibs) {
 
 # static libraries
 AddFilesToPackage develop lib $(architecture) :
+	<$(architecture)>libc.a
 	<$(architecture)>libcolumnlistview.a
 	<$(architecture)>liblocalestub.a
 	<$(architecture)>libm.a

src/system/libroot/Jamfile

@@ -101,6 +101,8 @@ for architectureObject in [ MultiArchSubDirSetup ] {
 			[ TargetLibgcc ]
 			;
 
+		# These are defined in POSIX for c99 support, so fake'em
+		StaticLibrary [ MultiArchDefaultGristFiles libc.a ] : empty.c ;
 		StaticLibrary [ MultiArchDefaultGristFiles libm.a ] : empty.c ;
 		StaticLibrary [ MultiArchDefaultGristFiles libpthread.a ] : empty.c ;