cad/qucs-s: add come comments

[ea1abz (via pkgsrc-wip) <commit-notify%pkgsrc.org@localhost>]

Module Name:	pkgsrc-wip
Committed By:	ea1abz <ea1abz%gmail.com@localhost>
Pushed By:	ea1abz
Date:		Fri Dec 19 16:34:53 2025 +0100
Changeset:	4aee46fde333438111768a9d62f158bd185f7994

Modified Files:
	qucs-s/Makefile
	qucs-s/TODO

Log Message:
cad/qucs-s: add come comments

To see a diff of this commit:
https://wip.pkgsrc.org/cgi-bin/gitweb.cgi?p=pkgsrc-wip.git;a=commitdiff;h=4aee46fde333438111768a9d62f158bd185f7994

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.

diffstat:
 qucs-s/Makefile | 2 ++
 qucs-s/TODO     | 9 ++++-----
 2 files changed, 6 insertions(+), 5 deletions(-)

diffs:
diff --git a/qucs-s/Makefile b/qucs-s/Makefile
index 7bd149d768..65850334d5 100644
--- a/qucs-s/Makefile
+++ b/qucs-s/Makefile
@@ -13,6 +13,8 @@ COMMENT=	Circuit simulation program based on Qucs circuit simulator
 LICENSE=	gnu-gpl-v2
 
 USE_LANGUAGES=	c c++
+# Upstream CMakeLists.txt select C++17 or C++20 depending on Qt version.
+# In pkgsrc-current, Qt >= 6.7 is used, which requires C++20
 FORCE_CXX_STD=	gnu++20
 USE_TOOLS+=	bison
 TOOL_DEPENDS+=	dos2unix-[0-9]*:../../converters/dos2unix
diff --git a/qucs-s/TODO b/qucs-s/TODO
index 1c53b17700..041c7cf0be 100644
--- a/qucs-s/TODO
+++ b/qucs-s/TODO
@@ -3,11 +3,10 @@ to work but not sure about the dependencies. It needs to be tested
 and revised but it is a good starting point. Some missing points:
 
 
-  * Determine language variants of C and C++ that are needed and
-    encode them.  Check if the package adds --std, and if not file
-    a bug upstream and add FORCE_CXX_STD.  Asked upstream for
-    standard C and C++ requirements. In the meantime FORCE_CXX_STD=
-    gnu++20 is used.
+  - Asked upstream for standard C and C++ requirements. Upstream
+    CMakeLists.txt select C++17 or C++20 depending on Qt version.
+    In pkgsrc-current, Qt >= 6.7 is used, which requires C++20.
+    In the  meantime FORCE_CXX_STD=    gnu++20 is used.
 
   - File a bug upstream about CMAKE_MANDIR (or whatever it actually
     is called) not being respected; add URL to one of the patchfiles.