gcc >= 14 supports gnu23

git-svn-id: https://svn.r-project.org/R/trunk@89415 00db46b3-68df-0310-9c12-caf00c1e9a41

Author: ripley

src/gnuwin32/fixed/etc/Makeconf

@@ -110,7 +110,7 @@ CPPFLAGS =
 CC17 = $(BINPREF)$(CCBASE) $(M_ARCH)
 C17FLAGS = -O3 -Wall $(DEBUGFLAG) -std=gnu17 @EOPTS@ @SANOPTS@ $(LTO)
 CC23 = $(BINPREF)$(CCBASE) $(M_ARCH)
-C23FLAGS = -O3 -Wall $(DEBUGFLAG) -std=gnu2x @EOPTS@ @SANOPTS@ $(LTO)
+C23FLAGS = -O3 -Wall $(DEBUGFLAG) -std=gnu23 @EOPTS@ @SANOPTS@ $(LTO)
 CC90 = $(BINPREF)$(CCBASE) $(M_ARCH)
 C90FLAGS = -O3 -Wall $(DEBUGFLAG) -std=gnu90 @EOPTS@ @SANOPTS@ $(LTO)
 CC99 = $(BINPREF)$(CCBASE) $(M_ARCH)