build: drop tool_hugehelp.c.cvs, tidy up macros, drop buildconf.bat

Rework the way `tool_hugehelp.c` is included in builds.

After this patch, with `./configure` and CMake `tool_hugehelp.c` is only
compiled when building with manuals enabled. With manuals disabled this
source file is not used anymore. The method is similar to how
8a3740b implemented `tool_ca_embed.c`.
`./configure` always generates it as before, otherwise the build fails.

- winbuild: rework to not need `buildconf.bat`, but automatically use
  `tool_hugehelp.c` if present (e.g. when building from an official
  source tarball) and enable `USE_MANUAL` accordingly.

- `buildconf.bat`: after dropping `tool_hugehelp.c` generation, the only
  logic left was `cp Makefile.dist Makefile`. This allowed to launch
  winbuild builds via GNU Make in a Git repo. Drop this option together
  with the batch file.

- build `libcurltool` without `USE_MANUAL` macro to exclude the manual
  and the dependence on the generator commands. Drop relying on
  `UNITTESTS` for this purpose.
  Follow-up to 96843f4 curl#16068

- `src/mkhelp.pl`: include `tool_hugehelp.h` before using `USE_MANUAL`
  to have it set in `config-*.h` builds with source tarballs created
  with manual but without zlib.

Closes curl#16081

.github/scripts/distfiles.sh

@@ -29,7 +29,6 @@ gitonly=".git*
 ^scripts/installcheck.sh
 ^scripts/release-notes.pl
 ^scripts/singleuse.pl
-^src/tool_hugehelp.c.cvs
 ^tests/CI.md"
 
 tarfiles="$(mktemp)"

GIT-INFO.md

@@ -21,10 +21,6 @@ Daniel uses a configure line similar to this for easier development:
 
     ./configure --disable-shared --enable-debug --enable-maintainer-mode
 
-In environments that do not support configure (i.e. Windows), do this:
-
-    buildconf.bat
-
 ## REQUIREMENTS
 
 See [docs/INTERNALS.md][0] for requirement details.

Makefile.am

@@ -83,7 +83,7 @@ PLAN9_DIST = plan9/include/mkfile \
 
 EXTRA_DIST = CHANGES.md COPYING Makefile.dist             \
  RELEASE-NOTES $(CMAKE_DIST) $(VC_DIST) $(WINBUILD_DIST)  \
- $(PLAN9_DIST) buildconf.bat Dockerfile
+ $(PLAN9_DIST) Dockerfile
 
 DISTCLEANFILES = buildinfo.txt
 

Makefile.dist

@@ -30,28 +30,13 @@ ssl:
 	./configure --with-openssl
 	make
 
-vc:
-	cd winbuild
-	nmake /f Makefile.vc MACHINE=x86
-
-vc-x64:
-	cd winbuild
-	nmake /f Makefile.vc MACHINE=x64
-
-cygwin:
-	./configure
-	make
-
-cygwin-ssl:
-	./configure --with-openssl
-	make
+cygwin: all
+cygwin-ssl: ssl
 
 unix: all
-
 unix-ssl: ssl
 
 linux: all
-
 linux-ssl: ssl
 
 ca-bundle: scripts/mk-ca-bundle.pl

appveyor.sh

@@ -75,7 +75,6 @@ elif [ "${BUILD_SYSTEM}" = 'VisualStudioSolution' ]; then
   )
   curl="build/Win32/${VC_VERSION}/${PRJ_CFG}/curld.exe"
 elif [ "${BUILD_SYSTEM}" = 'winbuild_vs2015' ]; then
-  ./buildconf.bat
   (
     cd winbuild
     cat << EOF > _make.bat
@@ -88,7 +87,6 @@ EOF
   )
   curl="builds/libcurl-vc14-x64-${PATHPART}-dll-ssl-dll-ipv6-sspi/bin/curl.exe"
 elif [ "${BUILD_SYSTEM}" = 'winbuild_vs2017' ]; then
-  ./buildconf.bat
   (
     cd winbuild
     cat << EOF > _make.bat

docs/HTTP3.md

@@ -303,10 +303,6 @@ prompt](../winbuild/README.md#open-a-command-prompt)):
      % cd curl/winbuild
      % nmake /f Makefile.vc mode=dll WITH_MSH3=dll MSH3_PATH="C:/Program Files/msh3" MACHINE=x64
 
-**Note** - If you encounter a build error with `tool_hugehelp.c` being
-missing, rename `tool_hugehelp.c.cvs` in the same directory to
-`tool_hugehelp.c` and then run `nmake` again.
-
 Run in the `C:/Program Files/msh3/lib` directory, copy `curl.exe` to that
 directory, or copy `msquic.dll` and `msh3.dll` from that directory to the
 `curl.exe` directory. For example:

lib/config-win32.h

@@ -500,11 +500,6 @@ Vista
 #  endif /* UNDER_CE */
 #endif /* !CURL_OS */
 
-/* If you want to build curl with the built-in manual */
-#ifndef UNDER_CE
-#define USE_MANUAL 1
-#endif
-
 /* ---------------------------------------------------------------- */
 /*                            Windows CE                            */
 /* ---------------------------------------------------------------- */