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SDL2 dependent program compile fail, missing header [SOLVED]
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reimugenso
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Joined: 19 Jun 2018
Posts: 2

PostPosted: Tue Jun 19, 2018 1:23 am    Post subject: SDL2 dependent program compile fail, missing header [SOLVED] Reply with quote

I wrote a simple SDL2 program to check if I can use the library:

main.h
Code:

#ifndef _MAIN_H
   #define _MAIN_H

#include <SDL2/SDL.h>
#include <SDL2/SDL_log.h>
#include <iostream>

#endif


main.cpp
Code:

#include "main.h"

int main(){
   if (SDL_Init(SDL_INIT_AUDIO | SDL_INIT_VIDEO) < 0) {
      SDL_log("Cannot initialize SDL: %s", SDL_GetError());   
      return 1;
   }
   SDL_Quit();
   return 0;
}


After compiling, I get this error message as a result:
Code:

reimu@toho-genso ~/XXXX/XXXXXX $ g++ main.cpp
In file included from /usr/include/SDL2/SDL_config.h:10:0,
                 from /usr/include/SDL2/SDL_stdinc.h:31,
                 from /usr/include/SDL2/SDL_main.h:25,
                 from /usr/include/SDL2/SDL.h:32,
                 from main.h:4,
                 from main.cpp:1:
/usr/include/x86_64-pc-linux-gnu/SDL2/SDL_config.h:33:26: fatal error: SDL_platform.h: No such file or directory
 #include "SDL_platform.h"
                          ^
compilation terminated.



Checking /usr/include/x86_65-pc_linux-gnu/SDL2, I discovered that it only
contained SDL_config.h Moving the entire contents of /usr/include/SDL2/ (while
preserving the original SDL_config.h in the destination) did not help with
making a working executable. I had undefined references to SDL_Init() and
SDL_Quit(), which should both be in SDL.h


Code:

Portage 2.3.40 (python 3.5.5-final-0, default/linux/amd64/17.0/desktop, gcc-6.4.0, glibc-2.26-r7, 4.16.6-gentoo x86_64)
=================================================================
System uname: Linux-4.16.6-gentoo-x86_64-Intel-R-_Core-TM-_i3-2310M_CPU_@_2.10GHz-with-gentoo-2.4.1
KiB Mem:     3923896 total,   1299404 free
KiB Swap:    4194300 total,   4194300 free
Timestamp of repository gentoo: Mon, 18 Jun 2018 14:30:01 +0000
Head commit of repository gentoo: 4eb290ca49ac2270122db0c4c4420c2b2456502f
sh bash 4.4_p12
ld GNU ld (Gentoo 2.29.1 p3) 2.29.1
app-shells/bash:          4.4_p12::gentoo
dev-java/java-config:     2.2.0-r4::gentoo
dev-lang/perl:            5.24.3-r1::gentoo
dev-lang/python:          2.7.14-r1::gentoo, 3.5.5::gentoo
dev-util/cmake:           3.9.6::gentoo
dev-util/pkgconfig:       0.29.2::gentoo
sys-apps/baselayout:      2.4.1-r2::gentoo
sys-apps/openrc:          0.34.11::gentoo
sys-apps/sandbox:         2.13::gentoo
sys-devel/autoconf:       2.13::gentoo, 2.69-r4::gentoo
sys-devel/automake:       1.11.6-r3::gentoo, 1.15.1-r2::gentoo
sys-devel/binutils:       2.29.1-r1::gentoo, 2.30-r2::gentoo
sys-devel/gcc:            6.4.0-r1::gentoo
sys-devel/gcc-config:     1.8-r1::gentoo
sys-devel/libtool:        2.4.6-r3::gentoo
sys-devel/make:           4.2.1::gentoo
sys-kernel/linux-headers: 4.13::gentoo (virtual/os-headers)
sys-libs/glibc:           2.26-r7::gentoo
Repositories:

gentoo
    location: /usr/portage
    sync-type: rsync
    sync-uri: rsync://rsync.gentoo.org/gentoo-portage
    priority: -1000
    sync-rsync-extra-opts:
    sync-rsync-verify-jobs: 1
    sync-rsync-verify-max-age: 24
    sync-rsync-verify-metamanifest: yes

reimu_overlay
    location: /usr/local/portage
    masters: gentoo

ACCEPT_KEYWORDS="amd64"
ACCEPT_LICENSE="* -@EULA"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-march=native -O2 -pipe"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/share/gnupg/qualified.txt"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/dconf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/splash /etc/terminfo /etc/texmf/language.dat.d /etc/texmf/language.def.d /etc/texmf/updmap.d /etc/texmf/web2c"
CXXFLAGS="-march=native -O2 -pipe"
DISTDIR="/usr/portage/distfiles"
ENV_UNSET="DBUS_SESSION_BUS_ADDRESS DISPLAY PERL5LIB PERL5OPT PERLPREFIX PERL_CORE PERL_MB_OPT PERL_MM_OPT XAUTHORITY XDG_CACHE_HOME XDG_CONFIG_HOME XDG_DATA_HOME XDG_RUNTIME_DIR"
FCFLAGS="-O2 -pipe"
FEATURES="assume-digests binpkg-logs config-protect-if-modified distlocks ebuild-locks fixlafiles merge-sync multilib-strict news nostrip parallel-fetch preserve-libs protect-owned sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr"
FFLAGS="-O2 -pipe"
GENTOO_MIRRORS="ftp://ftp.swin.edu.au/gentoo http://ftp.swin.edu.au/gentoo http://ftp.iij.ad.jp/pub/linux/gentoo/ rsync://ftp.iij.ad.jp/pub/linux/gentoo/ ftp://ftp.iij.ad.jp/pub/linux/gentoo/ http://ftp.jaist.ac.jp/pub/Linux/Gentoo/ ftp://ftp.jaist.ac.jp/pub/Linux/Gentoo/ rsync://ftp.jaist.ac.jp/pub/Linux/Gentoo/"
LANG="en_GB.utf8"
LDFLAGS="-Wl,-O1 -Wl,--as-needed"
MAKEOPTS="-j2"
PKGDIR="/usr/portage/packages"
PORTAGE_CONFIGROOT="/"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --omit-dir-times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages --exclude=/.git"
PORTAGE_TMPDIR="/var/tmp"
USE="X a52 aac acl acpi alsa amd64 berkdb bindist bluetooth branding bzip2 cairo cdda cdr cli consolekit crypt cups cxx dbus dri dts dvd dvdr emboss encode exif fam flac fortran gdbm gif glamor gpm gtk iconv ipv6 jpeg lcms ldap libnotify libtirpc mad mng modules mp3 mp4 mpeg multilib ncurses nls nptl ogg opengl openmp pam pango pcre pdf png policykit ppds qt3support qt5 readline sdl seccomp spell ssl startup-notification svg tcpd tiff truetype udev udisks unicode upower usb vorbis wxwidgets x264 xattr xcb xml xv xvid zlib" ABI_X86="64" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci" APACHE2_MODULES="authn_core authz_core socache_shmcb unixd actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" CALLIGRA_FEATURES="karbon plan sheets stage words" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" CPU_FLAGS_X86="mmx sse sse2" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock isync itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf skytraq superstar2 timing tsip tripmate tnt ublox ubx" GRUB_PLATFORMS="efi-64" INPUT_DEVICES="libinput keyboard mouse" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-6 php7-0" POSTGRES_TARGETS="postgres9_5 postgres10" PYTHON_SINGLE_TARGET="python3_5" PYTHON_TARGETS="python2_7 python3_5" RUBY_TARGETS="ruby23" USERLAND="GNU" VIDEO_CARDS="amdgpu fbdev intel nouveau radeon radeonsi vesa dummy v4l" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq steal rawnat logmark ipmark dhcpmac delude chaos account"
Unset:  CC, CPPFLAGS, CTARGET, CXX, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LC_ALL, LINGUAS, PORTAGE_BINHOST, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS


I have both libsdl and libsdl2 installed.


Last edited by reimugenso on Tue Jun 19, 2018 3:13 pm; edited 1 time in total
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fedeliallalinea
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Joined: 08 Mar 2003
Posts: 20122
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PostPosted: Tue Jun 19, 2018 5:46 am    Post subject: Reply with quote

you specified sdl2 header dir?
Code:
$ g++ main.c
In file included from /usr/include/SDL2/SDL_config.h:10:0,
                 from /usr/include/SDL2/SDL_stdinc.h:31,
                 from /usr/include/SDL2/SDL_main.h:25,
                 from /usr/include/SDL2/SDL.h:32,
                 from main.h:4,
                 from main.c:1:
/usr/include/x86_64-pc-linux-gnu/SDL2/SDL_config.h:33:26: fatal error: SDL_platform.h: No such file or directory
 #include "SDL_platform.h"
                          ^
compilation terminated.
$ pkg-config --cflags --libs sdl2
-D_REENTRANT -I/usr/include/SDL2 -lSDL2
$ g++ main.c -D_REENTRANT -I/usr/include/SDL2 -lSDL2
main.c: In function ‘int main()’:
main.c:5:58: error: cannot convert ‘const char*’ to ‘double’ for argument ‘1’ to ‘double SDL_log(double)’
       SDL_log("Cannot initialize SDL: %s", SDL_GetError());
                                                          ^

chage SDL_log to SDL_Log
Code:
$ g++ main.c -D_REENTRANT -I/usr/include/SDL2 -lSDL2
$

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reimugenso
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Joined: 19 Jun 2018
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PostPosted: Tue Jun 19, 2018 3:10 pm    Post subject: Reply with quote

I changed the function name as you specified, and specified header directory. It worked, thank you.
I thought the header directory would have already been specified automatically...
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fedeliallalinea
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PostPosted: Tue Jun 19, 2018 4:02 pm    Post subject: Reply with quote

reimugenso wrote:
I thought the header directory would have already been specified automatically...

https://gcc.gnu.org/onlinedocs/cpp/Search-Path.html
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