Sponsored Content
Full Discussion: makefile ---querry
Top Forums UNIX for Dummies Questions & Answers makefile ---querry Post 302175067 by mobydick on Thursday 13th of March 2008 01:45:49 AM
Old 03-13-2008
makefile ---querry

my querry is about writing makefiles:-

i have gone through some sample make file and noticed that while writing the commands for a particular target..

some times two lines are written with a backslash like

LD_LIBRARY_PATH="/usr/openwin/lib"; export LD_LIBRARY_PATH; \
TK_LIBRARY=$(TK_DIR)/lib/tk8.4; export TK_LIBRARY; \
TCL_LIBRARY=$(TCL_DIR)/lib/tcl8.4; export TCL_LIBRARY; \
PATH=$(TK_DIR)/bin:$(TCL_DIR)/bin:${PATH}; export PATH; \
CFLAGS="$(ALL_INCLUDE)"; export CFLAGS; \
LDFLAGS="$(ALL_LLIB) $(ALL_RLIB)"; export LDFLAGS && \
CC=$(HOST_CC) CXX=$(HOST_CXX) MAKE=$(GMAKE) \
$(SRC_DIR)/configure \
--prefix=$(DEST_DIR



....can please any one explain me whats the significance of using "\" and the "&&"
in the command section of the makefile....does something special happens internally when execution starts

thanks & regards
malay
 

10 More Discussions You Might Find Interesting

1. HP-UX

querry on du

hi all, To summerize disk usage in human readable format we have "du -h" in linux,which gives the disk usage in MBs. do we have something similar in HP-UX ? thanks, amit (4 Replies)
Discussion started by: amit4g
4 Replies

2. Shell Programming and Scripting

parsing output from SQL querry

Hi all I have this output in a variable called ...yes $OUTPUT :-) original...huh these are tablespaces in an Oracle db how do I get this into another variable in two columns so I can do a check on the numbers (space left) SYSTEM 290; USERS 19; UNDOTBS1 1863; DATA 5982; SYSTEM 290; USERS... (7 Replies)
Discussion started by: ludvig
7 Replies

3. UNIX for Dummies Questions & Answers

gcc compiler ---querry

i am newbie my querry is if i am having a gcc compiler which has been a native build with a particular version of binutilities..then when i will use this compiler to build other packages ..then in the linking stage which linker it will use if i do not set my path. ...will it uses by default... (0 Replies)
Discussion started by: mobydick
0 Replies

4. UNIX for Dummies Questions & Answers

querry about ftp problem

hello , i want to know about a situation suppose i want to ftp to a system i try to login through root login root password ...will it fail i am getting ftp:500 command not recognized in a similar situation as soon as i am entering my email... (0 Replies)
Discussion started by: mobydick
0 Replies

5. UNIX for Dummies Questions & Answers

querry about xargs command

what is the real use of xargs command ..? ls -tr |xargs -I{} rm -f {} ....can any one tell me what is the significance of {} curly brackets in this command (1 Reply)
Discussion started by: mobydick
1 Replies

6. UNIX for Dummies Questions & Answers

Querry LDAP data

from aix server, is it a way to extract data from windows LDAP. i will need to extract only firstname, lastname and login either xml or csv format ? i can use ldifde command to extract above information, but i have to do it from windows server. (1 Reply)
Discussion started by: tjmannonline
1 Replies

7. Shell Programming and Scripting

text parsing querry

$ A=/t1/bin/f410pdb oIFS=$IFS IFS=/ $ set -- $A $ IFS=$oIFS $ echo $2 t1 $ echo $3 bin $ echo $4 f410pdb can any one please explain me what is done with IFS and how it is working internally ...i am interested to know in depth (2 Replies)
Discussion started by: mobydick
2 Replies

8. Solaris

solaris native binary ...querry

In a solaris 8 machine the native binaries are mainly kept under /bin and /usr/bin but some binaries i found in /usr/xpg4/bin please can anyone tell me in a little detail what is the reason to keep the binaries in different locations i mean /bin /usr/bin /usr/xpg4/bin ... (1 Reply)
Discussion started by: mobydick
1 Replies

9. UNIX for Advanced & Expert Users

Makefile problem - How to run module load in a Makefile

Hi, I'm trying to run the module load command in a Makefile and i'm getting the following error: make: module: command not found Why is this? Is there any way to run this command in a Makefile? NOTE: command - module load msjava/sunjdk/1.5.0 works fine outside of the Makefile (2 Replies)
Discussion started by: hernandinho
2 Replies

10. Homework & Coursework Questions

Help with Simple Multi-Level Makefile (Extremely New at Makefile)

Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted! 1. The problem statement, all variables and given/known data: Basically, the prompt is make a makefile with various sub makefiles in their respective subdirectories. All code... (1 Reply)
Discussion started by: Tatl
1 Replies
ccmakedep(1)						      General Commands Manual						      ccmakedep(1)

NAME
ccmakedep - create dependencies in makefiles using a C compiler SYNOPSIS
ccmakedep [ cpp-flags ] [ -wwidth ] [ -smagic-string ] [ -fmakefile ] [ -oobject-suffix ] [ -v ] [ -a ] [ -cccompiler ] [ -- options -- ] sourcefile ... DESCRIPTION
The ccmakedep program calls a C compiler to preprocess each sourcefile, and uses the output to construct makefile rules describing their dependencies. These rules instruct make(1) on which object files must be recompiled when a dependency has changed. By default, ccmakedep places its output in the file named makefile if it exists, otherwise Makefile. An alternate makefile may be speci- fied with the -f option. It first searches the makefile for a line beginning with # DO NOT DELETE or one provided with the -s option, as a delimiter for the dependency output. If it finds it, it will delete everything following this up to the end of the makefile and put the output after this line. If it doesn't find it, the program will append the string to the makefile and place the output after that. EXAMPLE
Normally, ccmakedep will be used in a makefile target so that typing 'make depend' will bring the dependencies up to date for the makefile. For example, SRCS = file1.c file2.c ... CFLAGS = -O -DHACK -I../foobar -xyz depend: ccmakedep -- $(CFLAGS) -- $(SRCS) OPTIONS
The program will ignore any option that it does not understand, so you may use the same arguments that you would for cc(1), including -D and -U options to define and undefine symbols and -I to set the include path. -a Append the dependencies to the file instead of replacing existing dependencies. -cccompiler Use this compiler to generate dependencies. -fmakefile Filename. This allows you to specify an alternate makefile in which ccmakedep can place its output. Specifying "-" as the file name (that is, -f-) sends the output to standard output instead of modifying an existing file. -sstring Starting string delimiter. This option permits you to specify a different string for ccmakedep to look for in the makefile. The default is "# DO NOT DELETE". -v Be verbose: display the C compiler command before running it. -- options -- If ccmakedep encounters a double hyphen (--) in the argument list, then any unrecognized arguments following it will be silently ignored. A second double hyphen terminates this special treatment. In this way, ccmakedep can be made to safely ignore esoteric compiler arguments that might normally be found in a CFLAGS make macro (see the EXAMPLE section above). -D, -I, and -U options appearing between the pair of double hyphens are still processed normally. SEE ALSO
cc(1), make(1), makedepend(1), ccmakedep(1). AUTHOR
ccmakedep was written by the X Consortium. Colin Watson wrote this manual page, originally for the Debian Project, based partly on the manual page for makedepend(1). X Version 11 imake 1.0.5 ccmakedep(1)
All times are GMT -4. The time now is 11:30 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy