AlliedModders - -fno-exceptions and throw

AlliedModders (https://forums.alliedmods.net/index.php)

- Module Coding (https://forums.alliedmods.net/forumdisplay.php?f=9)

- - -fno-exceptions and throw (https://forums.alliedmods.net/showthread.php?t=81700)

-fno-exceptions and throw

I have a problem writing module for linux version of hl server.

If I build with -fno-exceptions I get this error:
acc/include/AccSupport.h:47: error: exception handling disabled, use -fexceptions to enable
If I build with -fexceptions module is not loading in server (I doesn't spoted any message about why it is not loaded, but it is absent in meta list output)
AccSupport.h is include from foreign library. This library seem using exceptions.

Can I somehow solve this?

PS Under Windows (for windows version of hlds) this module compiles and works.

Re: -fno-exceptions and throw

The likely cause of it not loading with exceptions enabled is because the version of libstdc++ the binary is compiled against does not match the version on the machine, or libstdc++ may not even be on the machine.

Re: -fno-exceptions and throw

Quote:

Originally Posted by sawce (Post 725675)

I am run server on the same machine where I compiled the module. But any, thanks for helping. I will have a look at libstdc++.
Look at this thread:
http://forums.alliedmods.net/showthread.php?t=16859
-fno-exceptions mentioned there. May be AMXX doesn't allow modules with enabled exceptions? Can I somehow mix exceptions enabled code with wrapping it with non exception code?
I use this Makefile:

Code:

#(C)2004-2005 AMX Mod X Development Team

#(C)2008 Lev Shisterov

# Makefile written by David "BAILOPAN" Anderson

# Makefile corrected by Lev Shisterov



HLSDK = ../../../hlsdk-2.3-p3/multiplayer

MM_ROOT = ../../../metamod-1.19/metamod



### EDIT BELOW FOR OTHER PROJECTS ###



OPT_FLAGS = -O2 -funroll-loops -s -pipe -fomit-frame-pointer -fno-strict-aliasing

DEBUG_FLAGS = -g -ggdb3

CPP = gcc-4.1

NAME = icqbot



BIN_SUFFIX_32 = amxx_i386.so

BIN_SUFFIX_64 = amxx_amd64.so



OBJECTS = sdk/amxxmodule.cpp icqbot.cpp functions.cpp client.cpp PosixThreads.cpp



LINK = 



INCLUDE = -I. -Iacc/include -I$(HLSDK) -I$(HLSDK)/dlls -I$(HLSDK)/engine -I$(HLSDK)/game_shared -I$(HLSDK)/game_shared \

    -I$(MM_ROOT) -I$(HLSDK)/common -Isdk



GCC_VERSION := $(shell $(CPP) -dumpversion >&1 | cut -b1)



ifeq "$(GCC_VERSION)" "4"

        OPT_FLAGS += -fvisibility=hidden -fvisibility-inlines-hidden

endif



ifeq "$(DEBUG)" "true"

    BIN_DIR = Debug

    CFLAGS = $(DEBUG_FLAGS)

else

    BIN_DIR = Release

    CFLAGS = $(OPT_FLAGS)

endif



CFLAGS += -DNDEBUG -fPIC -Wall -Wno-non-virtual-dtor -fno-exceptions -DHAVE_STDINT_H -fno-rtti -static-libgcc



ifeq "$(AMD64)" "true"

    BINARY = $(NAME)_$(BIN_SUFFIX_64)

    CFLAGS += -DPAWN_CELL_SIZE=64 -DHAVE_I64 -m64 

else

    BINARY = $(NAME)_$(BIN_SUFFIX_32)

    CFLAGS += -DPAWN_CELL_SIZE=32 -DJIT -DASM32

    OPT_FLAGS += -march=i586

endif



OBJ_LINUX := $(OBJECTS:%.cpp=$(BIN_DIR)/%.o)



$(BIN_DIR)/%.o: %.cpp

    $(CPP) $(INCLUDE) $(CFLAGS) -o $@ -c $<



all:

    mkdir -p $(BIN_DIR)

    mkdir -p $(BIN_DIR)/sdk

    $(MAKE) icqbot



amd64:

    $(MAKE) all AMD64=true



icqbot: $(OBJ_LINUX)

    $(CPP) $(INCLUDE) $(CFLAGS) $(OBJ_LINUX) $(LINK) -shared -ldl -lm -o$(BIN_DIR)/$(BINARY)



debug:    

    $(MAKE) all DEBUG=true



default: all



clean:

    rm -rf Release/sdk/*.o

    rm -rf Release/*.o

    rm -rf Release/$(NAME)_$(BIN_SUFFIX_32)

    rm -rf Release/$(NAME)_$(BIN_SUFFIX_64)

    rm -rf Debug/sdk/*.o

    rm -rf Debug/*.o

    rm -rf Debug/$(NAME)_$(BIN_SUFFIX_32)

    rm -rf Debug/$(NAME)_$(BIN_SUFFIX_64)

If I compile with -fno-exceptions (warked no- with red in Makefile in CFLAGS) I got compilation error. With -fexceptions module is not loaded by AMXX.
Looked and found libstdc++.so.6.0.8 in /usr/bin. I am using debian 2.6.18-6 if this make sence.

Re: -fno-exceptions and throw

Update:
I tried to build cstrike module (it served me as example in the past). And has a luck. But this lead me to mistake. I used "meta list" to spot if module is loaded. Cstrike was shown in list.
Then I found that nvault module has -fexceptions option for build in 1.8.0 version. Tried to compile and load it. And meta list doesn't show it is loaded.
Some digging in Internet and I found that I was wrong. So I have to use "amxx modules".
Here is the output:

Code:

meta list

Currently loaded plugins:

      description      stat pend  file              vers      src  load  unlod

 [ 1] AMX Mod X        RUN   -    amxmodx_mm_i386.  v1.8.1.3  ini  Start ANY

 [ 2] CStrike          RUN   -    cstrike_amxx_i38  v1.8.0.3  pl1  ANY   ANY

2 plugins, 2 running

amxx modules

Currently loaded modules:

      name                    version     author               status

 [ 1] nVault                  1.8.0.3660  AMX Mod X Dev Team   running

 [ 2] CStrike                 1.8.0.3660  AMX Mod X Dev Team   running

2 modules, 2 correct

Re: -fno-exceptions and throw

Finally found were I was wrong: not linked with libstdc++.
In nvault Makefile found link to libstdc++.
Added this link to my test project with -fexceptions and get it loaded:

Code:

meta list

Currently loaded plugins:

      description      stat pend  file              vers      src  load  unlod

 [ 1] AMX Mod X        RUN   -    amxmodx_mm_i386.  v1.8.1.3  ini  Start ANY

 [ 2] CStrike          RUN   -    cstrike_amxx_i38  v1.8.0.3  pl1  ANY   ANY

 [ 3] Testing          RUN   -    testing_amxx_i38  v0.1      pl1  ANY   ANY

3 plugins, 3 running

amxx modules

Currently loaded modules:

      name                    version     author               status

 [ 1] nVault                  1.8.0.3660  AMX Mod X Dev Team   running

 [ 2] CStrike                 1.8.0.3660  AMX Mod X Dev Team   running

 [ 3] Testing                 0.1         Lev                  running

3 modules, 3 correct

Will try in my code.