Compilation link error :undefined reference to `drmxxx' functions of lindrm.so.2 about kmscon

[tonysliang]

@Aetf 总算正常运行了！ 谢谢了！

汉字正常显示 ,也可以缩放。

[Aetf]

Please include the full console starting from ./configure. And please use the ``` tag to properly format the output (I've edited your initial message).

[tonysliang]

Move path of libdrm.so.2 behind ./.libs/libuterm.a ,ld OK !

gcc -Wall -pipe -fno-common -ffast-math -fdiagnostics-show-option -fno-strict-aliasing -fvisibility=hidden -ffunction-sections -fdata-sections -fstack-protector -g -O2 -g -O2 -std=gnu99 -Wl,--as-needed -Wl,--gc-sections -Wl,-z -Wl,relro -Wl,-z -Wl,now -rdynamic -o kmscon src/kmscon-conf.o src/kmscon-pty.o src/kmscon-font.o src/kmscon-font_8x16.o src/kmscon-text.o src/kmscon-text_bblit.o src/kmscon-kmscon_module.o src/kmscon-kmscon_seat.o src/kmscon-kmscon_conf.o src/kmscon-kmscon_main.o src/kmscon-kmscon_dummy.o src/kmscon-kmscon_terminal.o   -L/usr/local/lib /usr/local/lib/libtsm.so ./.libs/libeloop.a  ./.libs/libuterm.a  /lib/x86_64-linux-gnu/libdrm.so.2  -ludev -l
systemd ./.libs/libshl.a -lxkbcommon -lGLESv2 -lpthread -ldl -pthread 

[Aetf]

Ok. So this is a link ordering problem. I'll see what I can do with it.

[tonysliang]

@Aetf My english is not good. so I just ctrl C and Ctrl V
./configure : warn not find libdrm. prompt export DRM_LIB
I do : export DRM_LIBS=/lib/x86_64-linux-gnu/libdrm.so.2 .

This is paragraphs of makefile made by configure.

 CCDEPMODE = depmode=gcc3
CC_FOR_BUILD = gcc
CFLAGS = -g -O2  -std=gnu99
CFLAGS_FOR_BUILD = -g -O2
CPP = gcc -E
CPPFLAGS = 
CPPFLAGS_FOR_BUILD = 
CPP_FOR_BUILD = gcc -E
CSCOPE = cscope
CTAGS = ctags
CYGPATH_W = echo
DEFS = -DHAVE_CONFIG_H
DEPDIR = .deps
DLLTOOL = false
DRM_CFLAGS = -I/usr/include/drm -I/usr/include/libdrm 
DRM_LIBS = -l/lib/x86_64-linux-gnu/libdrm.so.2
DSYMUTIL = 
.........
am__append_12 = $(DRM_CFLAGS)
am__append_13 = $(DRM_LIBS)
#am__append_14 = \
#	src/uterm_drm3d_internal.h \
#	src/uterm_drm3d_video.c \
#	src/uterm_drm3d_render.c
........

kmscon_SOURCES = src/conf.h src/conf.c src/pty.h src/pty.c src/font.h \
	src/font.c src/font_8x16.c src/text.h src/text.c \
	src/text_bblit.c src/kmscon_module_interface.h \
	src/kmscon_module.h src/kmscon_module.c src/kmscon_terminal.h \
	src/kmscon_dummy.h src/kmscon_seat.h src/kmscon_seat.c \
	src/kmscon_conf.h src/kmscon_conf.c src/kmscon_main.c \
	$(am__append_25) $(am__append_26)
nodist_kmscon_SOURCES = 
kmscon_CPPFLAGS = \
	$(AM_CPPFLAGS) \
	$(XKBCOMMON_CFLAGS) \
	$(TSM_CFLAGS)

kmscon_LDADD = \
	$(XKBCOMMON_LIBS) \
	$(TSM_LIBS) \
	libeloop.la \
	libuterm.la \
	$(am__append_13) \
	libshl.la \
	-lpthread \
	-ldl  
#$(am__append_13) \

kmscon_LDFLAGS = \
	$(AM_LDFLAGS) \
	-rdynamic

In kmscon_LDADD ,configure not $(am__append_13) .
After I add $(am__append_13) ,ld option is .... /lib/x86_64-linux-gnu/libdrm.so.2 .. ./.libs/libuterm.a ,but ld error!
I try move /lib/x86_64-linux-gnu/libdrm.so.2 behind ./.libs/libuterm.a in ld line, ld OK !
So .you need change configure.

[Aetf]

libuterm 本来就依赖drm，libtool 应该会自动处理依赖关系把 -ldrm 放到最后的。看样子大概率是你只安装了 libdrm，没有装libdrm-dev，所以 ./configure 找不到系统的 libdrm，你手动指定了路径导致的问题。

装上 libdrm-dev 然后再编译应该就可以。如果还是不行，完全重新编译一次然后把完整输出以及config.log,libuterm.la的内容贴过来。

make distclean && ./autogen.sh && make V=99

[tonysliang]

@Aetf you are right.

sudo apt list libdrm*
正在列表... 完成
libdrm-amdgpu1/impish,now 2.4.107-8ubuntu1 amd64 [已安装]
libdrm-common/impish,now 2.4.107-8ubuntu1 all [已安装，自动]
libdrm-dev/impish 2.4.107-8ubuntu1 amd64
libdrm-intel1/impish,now 2.4.107-8ubuntu1 amd64 [已安装]
libdrm-nouveau2/impish,now 2.4.107-8ubuntu1 amd64 [已安装]
libdrm-radeon1/impish,now 2.4.107-8ubuntu1 amd64 [已安装]
libdrm-tests/impish 2.4.107-8ubuntu1 amd64
libdrm2/impish,now 2.4.107-8ubuntu1 amd64 [已安装，自动]
libdrmaa1.0-java-doc/impish 8.1.9+dfsg-10 all
libdrmaa1.0-java/impish 8.1.9+dfsg-10 all
libdrmaa1.0-ruby/impish 8.1.9+dfsg-10 all

sudo apt install libdrm-dev
./configure
make
OK!

this is kmscon command line

link: gcc -Wall -pipe -fno-common -ffast-math -fdiagnostics-show-option -fno-strict-aliasing -fvisibility=hidden -ffunction-sections -fdata-sections -fstack-protector -g -O2 -g -O2 -Wl,--as-needed -Wl,--gc-sections -Wl,-z -Wl,relro -Wl,-z -Wl,now -rdynamic -o kmscon src/kmscon-conf.o src/kmscon-pty.o src/kmscon-font.o src/kmscon-font_8x16.o src/kmscon-text.o src/kmscon-text_bblit.o src/kmscon-kmscon_module.o src/kmscon-kmscon_seat.o src/kmscon-kmscon_conf.o src/kmscon-kmscon_main.o src/kmscon-kmscon_dummy.o src/kmscon-kmscon_terminal.o  -L/usr/local/lib /usr/local/lib/libtsm.so ./.libs/libeloop.a ./.libs/libuterm.a -ludev -lsystemd -ldrm ./.libs/libshl.a -lxkbcommon -lGLESv2 -lpthread -ldl -pthread
depbase=`echo src/genunifont.o | sed 's|[^/]*$|.deps/&|;s|\.o$||'`;\

you are great!
在同时安装原版kmscon 和 本改进版时，遇到 lib/kmscon/*.so 版本冲突问题， 建议改进版 选择一个 新的目录 或者 动态库带上版本号。 但不知道为啥 运行这个改进版本， 汉字都显示 ?? 呢？

sudo kmsconY  --vt  tty4  --font-name "Sans"
[0000.000000] NOTICE: kmscon Revision kmscon-8 Jul  7 2020 14:00:10
[0000.010060] ERROR: module: incompatible module /usr/lib/kmscon/mod-pango.so (kmscon-8-40-g01dd0a2 != kmscon-8)
[0000.016107] ERROR: module: incompatible module /usr/lib/kmscon/mod-gltex.so (kmscon-8-40-g01dd0a2 != kmscon-8)
[0000.017403] ERROR: module: incompatible module /usr/lib/kmscon/mod-unifont.so (kmscon-8-40-g01dd0a2 != kmscon-8)
[0000.019005] ERROR: module: incompatible module /usr/lib/kmscon/mod-bbulk.so (kmscon-8-40-g01dd0a2 != kmscon-8)
[0000.030385] NOTICE: vt: using tty /dev/tty4

[Aetf]

在同时安装原版kmscon 和 本改进版时，遇到 lib/kmscon/*.so 版本冲突问题， 建议改进版 选择一个 新的目录 或者 动态库带上版本号

为什么需要同时安装两个版本？

运行这个改进版本， 汉字都显示 ?? 呢？

字体配置，或者是 locale 编码问题吧。也有可能是因为你强行装了两个版本有些库的版本不对，建议你完全卸载原版之后再试试。