Re: Compiling on cygwin fails

[Thomas Dickey]

On Wed, Jun 19, 2024 at 09:20:13PM +0200, vcoxvco wrote:
> Hi,
> 
> on cygwin (3.5.3) and current ncurses (ncurses-6.5-20240615) I get a compile
> error when compiling make_keys.c (after ./configure && make)
> (I didn't try older combinations of cygwin/ncurses)
> 
> gcc -o make_keys.exe -DHAVE_CONFIG_H -DUSE_BUILD_CC -I../ncurses -I.

hmm - I may have caused that in a recent change where I was separating
the build-flags from the target-flags in cross-compiling.  That seemed
to work fine - but I've not been on cygwin for a month or so.

> -I../include -I./../include  -O2 --param max-inline-insns-single=1200
> ./tinfo/make_keys.c
> In file included from ./tinfo/make_keys.c:45:
> ../ncurses/names.c:354:5: error: variable ‘boolnames’ definition is marked 
> dllimport
>   354 | DCL(boolnames) = {
>       |     ^~~~~~~~~
> ../ncurses/names.c:352:40: note: in definition of macro ‘DCL’
>   352 | #define DCL(it) NCURSES_EXPORT_VAR(IT) it[]
>       |                                        ^~
> ../ncurses/names.c:403:5: error: variable ‘boolfnames’ definition is marked 
> dllimport
> 
> 
> Tracking that down I found that these lines in ncurses_dll.h cause the 
> problem:
> 
> #if defined(__CYGWIN__) || (defined(_WIN32) || defined(_WIN64))
> # if defined(NCURSES_STATIC)  /* "static" here only implies "not-a-DLL" */
> #   define NCURSES_EXPORT_GENERAL_IMPORT
> #   define NCURSES_EXPORT_GENERAL_EXPORT
> # else
> #   define NCURSES_EXPORT_GENERAL_IMPORT __declspec(dllimport)
> #   define NCURSES_EXPORT_GENERAL_EXPORT __declspec(dllexport)
> # endif
> 
> When forcing __declspec, e.g.
> 
> #if defined(xx__CYGWIN__) || (defined(xx_WIN32) || defined(xx_WIN64))
> 
> in ncurses_dll.h and ncurses_dll.h.in, respectively, everything works fine.
> 
> 
> Is this a general problem or do I have to investigate further in my 
> environment?
> 
> Regards
> Vassili
> 
> 
> -- 
> V. Courzakis
> email: vcoxvco@googlemail.com
> 
> 
> --- 8< ---
> ./configure
> 
> [...]
> gawk -f ./tinfo/MKcodes.awk bigstrings=1 ../include/Caps 
> ../include/Caps-ncurses >codes.c
> gcc -o make_hash.exe -DHAVE_CONFIG_H -DUSE_BUILD_CC -I../ncurses -I.
> -I../include -I./../include  -O2 --param max-inline-insns-single=1200
> ./tinfo/make_hash.c
> In file included from ./tinfo/make_hash.c:60:
> ../ncurses/tinfo/doalloc.c:46:1: warning: ‘_nc_doalloc’ redeclared without
> dllimport attribute: previous dllimport ignored [-Wattributes]
>    46 | _nc_doalloc(void *oldp, size_t amount)
>       | ^~~~~~~~~~~
> /bin/sh -e ./tinfo/MKcaptab.sh gawk 1 ./tinfo/MKcaptab.awk ../include/Caps
> ../include/Caps-ncurses > comp_captab.c
> /bin/sh -e ./tinfo/MKuserdefs.sh gawk 1 ../include/Caps 
> ../include/Caps-ncurses > comp_userdefs.c
> /bin/sh -e ./tty/MKexpanded.sh "gcc -E" -DHAVE_CONFIG_H -DBUILDING_NCURSES
> -I../ncurses -I. -I../include -D_GNU_SOURCE -D_DEFAULT_SOURCE -DNDEBUG >
> expanded.c
> /bin/sh -e ./tinfo/MKfallback.sh /usr/share/terminfo ../misc/terminfo.src
> "tic" "infocmp" >fallback.c
> FGREP="grep -F" /bin/sh -e ./base/MKlib_gen.sh "gcc -E -DHAVE_CONFIG_H
> -DBUILDING_NCURSES -I../ncurses -I. -I../include -D_GNU_SOURCE
> -D_DEFAULT_SOURCE -DNDEBUG" "gawk" generated <../include/curses.h >lib_gen.c
> .. adding -P option to work around gcc 11
> AWK=gawk USE_SIGWINCH=1 /bin/sh ./tinfo/MKkeys_list.sh ../include/Caps
> ../include/Caps-ncurses | LC_ALL=C sort >keys.list
> gawk -f ./base/MKkeyname.awk use_sigwinch=1 bigstrings=1 keys.list > 
> lib_keyname.c
> FGREP="grep -F" /bin/sh -e ./base/MKlib_gen.sh "gcc -E -DHAVE_CONFIG_H
> -DBUILDING_NCURSES -I../ncurses -I. -I../include -D_GNU_SOURCE
> -D_DEFAULT_SOURCE -DNDEBUG" "gawk" implemented <../include/curses.h
> >link_test.c
> .. adding -P option to work around gcc 11
> gawk -f ./tinfo/MKnames.awk bigstrings=1 ../include/Caps 
> ../include/Caps-ncurses >names.c
> echo | gawk -f ./base/MKunctrl.awk bigstrings=1 >unctrl.c
> gcc -o make_keys.exe -DHAVE_CONFIG_H -DUSE_BUILD_CC -I../ncurses -I.
> -I../include -I./../include  -O2 --param max-inline-insns-single=1200
> ./tinfo/make_keys.c
> In file included from ./tinfo/make_keys.c:45:
> ../ncurses/names.c:354:5: error: variable ‘boolnames’ definition is marked 
> dllimport
>   354 | DCL(boolnames) = {
>       |     ^~~~~~~~~
> ../ncurses/names.c:352:40: note: in definition of macro ‘DCL’
>   352 | #define DCL(it) NCURSES_EXPORT_VAR(IT) it[]
>       |                                        ^~
> ../ncurses/names.c:403:5: error: variable ‘boolfnames’ definition is marked 
> dllimport
>   403 | DCL(boolfnames) = {
>       |     ^~~~~~~~~~
> ../ncurses/names.c:352:40: note: in definition of macro ‘DCL’
>   352 | #define DCL(it) NCURSES_EXPORT_VAR(IT) it[]
>       |                                        ^~
> ../ncurses/names.c:452:5: error: variable ‘numnames’ definition is marked 
> dllimport
>   452 | DCL(numnames) = {
>       |     ^~~~~~~~
> ../ncurses/names.c:352:40: note: in definition of macro ‘DCL’
>   352 | #define DCL(it) NCURSES_EXPORT_VAR(IT) it[]
>       |                                        ^~
> ../ncurses/names.c:496:5: error: variable ‘numfnames’ definition is marked 
> dllimport
>   496 | DCL(numfnames) = {
>       |     ^~~~~~~~~
> ../ncurses/names.c:352:40: note: in definition of macro ‘DCL’
>   352 | #define DCL(it) NCURSES_EXPORT_VAR(IT) it[]
>       |                                        ^~
> ../ncurses/names.c:540:5: error: variable ‘strnames’ definition is marked 
> dllimport
>   540 | DCL(strnames) = {
>       |     ^~~~~~~~
> ../ncurses/names.c:352:40: note: in definition of macro ‘DCL’
>   352 | #define DCL(it) NCURSES_EXPORT_VAR(IT) it[]
>       |                                        ^~
> ../ncurses/names.c:959:5: error: variable ‘strfnames’ definition is marked 
> dllimport
>   959 | DCL(strfnames) = {
>       |     ^~~~~~~~~
> ../ncurses/names.c:352:40: note: in definition of macro ‘DCL’
>   352 | #define DCL(it) NCURSES_EXPORT_VAR(IT) it[]
>       |                                        ^~
> 
> 

-- 
Thomas E. Dickey <dickey@invisible-island.net>
https://invisible-island.net

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