(math/R) Add comment for requirement of gcc

[Makoto Fujiwara (via pkgsrc-wip) <commit-notify%pkgsrc.org@localhost>]

Module Name:	pkgsrc-wip
Committed By:	Makoto Fujiwara <makoto%if.t.u-tokyo.ac.jp@localhost>
Pushed By:	mef
Date:		Sat Jun 7 22:09:56 2025 +0900
Changeset:	f610ed38f250f75405ab8bbddd8b4650db695cc5

Modified Files:
	R/Makefile

Log Message:
(math/R) Add comment for requirement of gcc

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diffstat:
 R/Makefile | 6 ++++++
 1 file changed, 6 insertions(+)

diffs:
diff --git a/R/Makefile b/R/Makefile
index 9f85419f3a..3472834a79 100644
--- a/R/Makefile
+++ b/R/Makefile
@@ -14,6 +14,12 @@ COMMENT=	Statistical language for data analysis and graphics
 LICENSE=	gnu-gpl-v2
 
 USE_GCC_RUNTIME=	yes
+# uncomment following line helps packaging on 9.4
+# GCC_REQD+=		10
+
+# https://cran.r-project.org/doc/manuals/r-release/NEWS.pdf
+# above line mentions c23 as default compiler for R, but c23 (gcc15) is N/A ?
+# USE_CC_FEATURES+=	c23
 
 BUILD_TARGET=		all info
 INSTALL_TARGET=		install install-info