C++ :: Checking For IDConfig In Makefile?
Mar 29, 2012
How do I check for ldconfig in a makefile? This makefile errors because it tries to run ldconfig, even though OS = Darwin
Code:
ifeq ($(SHARED),1)
install: banner install_headers $(lib_target)
@echo "Install shared library"
cp -f ./$(lib_target) $(inst_path)
cd $(inst_path) ;
[Code] ....
Errors
Code:
/bin/sh: -c: line 0: syntax error near unexpected token `Darwin,Darwin'
/bin/sh: -c: line 0: `ifneq (Darwin,Darwin)'
make: *** [install] Error 2
make: ldconfig: No such file or directory
make: *** [uninstall] Error 1
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Aug 7, 2014
What is dependency in Makefile.
Secondly I have made Makefile but cannot use make -f . How to use it?
Third what is make [OPTION] [TARGET]
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Feb 5, 2013
I've a problem compiling my makefile. The additional files are enclosed.
the error I get:
$make ./main
gcc -ggdb main.c
/tmp/ccPIxwjP.o: In function `main':
/home/ilan/Embedded_linux/Lesson-2-Makefiles/lesson-2.1/main.c:6: undefined reference to `func1'
/home/ilan/Embedded_linux/Lesson-2-Makefiles/lesson-2.1/main.c:7: undefined reference to `func2'
collect2: error: ld returned 1 exit status
make: *** [main.o] Error 1
$
Code:
my make file:
main : main.o file1.o file2.o
gcc -ggdb main.o file1.o file2.o -o gdb-main
main.o : main.c file1.h file2.h
[Code] .....
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Aug 1, 2014
use makefiles, how to create a makefile with cpp files and the binary file in different directories.
These are my directories:
Project/
|
|-makefile
|
|__src/__.cpp files
|
|
|__bin/__ .exe
|
|
|__inc/__ .h files
|
|
|__obj/__ .o files
I have done this:
CC = g++
CFLAGS = -I.
SRCDIR = src
OBJDIR = obj
BINDIR = bin
INCDIR = inc
SOURCES := $(wildcard $(SRCDIR)/*.cpp)
[Code] .....
but console says "no rule to make target main.cpp, needed by project"
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Jan 31, 2014
How do I compile a more than one executables? If I have two rules to compile an executables, after it compiles the first, it will stop.
a: a.h a.cpp
g++ a.h a.cpp
b: b.h b.cpp
g++ b.h b.cpp
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Mar 15, 2013
Why this makefile only executes the first entry, compiling only the first program listed?
###########################################################
#
# Simple Makefile for Operating Systems Project 2
#
###########################################################
vowcon:
g++ -o vowcon vowcon.cpp -pthread
osproj2c:
g++ -o osproj2c osproj2c.cpp -pthread
osproj2b:
g++ -o osproj2b osproj2b.cpp -pthread
osproj2a:
gcc -o osproj2a osproj2a.c -pthread
clean:
rm osproj2a osproj2b osproj2c osproj2d vowcon
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May 18, 2013
I would like to call a script from a makfile to glean some information about the OS. What I more or less need is the OS name and version (CentOS-5.9, OPENSUSE-12.2, Cygwin, etc). I think I can get the rest of what I need from uname. The OS name and version doesn't seem to reside in any consistent place over the various Linux flavors. I also need to get the version of the gnu c compiler, since I think that may also require a bit more involved scripting than I would like to try out of make.
The main question is weather I can call a script out of make and have it return a value for a variable.
Something like,
OS := $(shell ./script_name)
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Mar 17, 2014
I have called a C function inside C++ code. The .so which gets created is a 32 bit while I am looking for 64 bit . What all options should be mentioned in the Make file to eventually compile and get shared object of ELF64 CLASS ?
Excerpts from Makefile
-----------------------------
CC = gcc
CXX = g++
CPPFLAGS = -I. -I$(S) -DHAVE_CONFIG_H
CFLAGS = -O2 -pipe
CXXFLAGS = -g -O2
LDFLAGS =
LIBS = -lsocket -lnsl
[Code] .....
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May 20, 2013
I'm trying to create a Makefile for a single fie ( mycod.c)
What is the syntax?
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Sep 19, 2013
I usually check if a bit is set using:
Code: bit = (number >> n) & 1; where `n` is the bit I want to check...
But I came across a stackoverflow answer saying:
bit = number & (1 << x); will not put the value of bit x into bit unless bit has type _Bool (<stdbool.h>).
Otherwise, bit = !!(number & (1 << x)); will..
So why is this? why the double !?
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Nov 4, 2013
Everything seems to be correct from my perspective. heres the program: Code: /*c program to check whether a string is palindrome or not*/
#include<stdio.h>
#include<string.h>
int main(void) {
char str[30];
int i,j,flag=0;
[Code] .....
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Dec 8, 2013
The reason being is that it says that my program is right
Code:
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#define NFlights 10
struct date {
int month;
int day;
int year;
int hour;
int minute;
[Code] ....
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Jun 15, 2013
Q. In context of C language syntax checking, which of the following can be modeled using Finite Automata?
(A) Detecting proper termination of an instruction.
(B) Detecting balance of parentheses.
(C) Detecting initialization of a variable.
(D) None of the above.
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Jan 31, 2015
I am new to C++ , i want to know how to check if a key with modifier is pressed.
When I use GetAsyncKeyState() it gives me error identifier not found.
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Aug 4, 2013
I think I may have found a new way of checking for 3d polygon collisions, but I'm not sure. The method involves...
1. finding the planes that the primitives lie on
2. finding the line where the planes intersect
3. if both polys have points on both sides of the line AND have points that overlap on the 1d space of the line, then they intersect.
I have some half done code testing this, and so far it seems to be sound and fairly fast. These are some average time-tests done on my machine for each part:
1. 30 microseconds (both)
2. 7 microseconds
3. TBD
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Jun 17, 2014
I have a question, how can I check if a program is running using c++? For example
if (notepad.exe is running) {
.... ..... ....
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Jul 20, 2014
How would I go about checking for deallocated memory?
For example, let's take this into consideration:
// Unsigned 32-bit / 64-bit integer: uint32, uint64
uint32* Pointer = new uint32[ Size ];
uint64 MemAddr = ( uint64 ) Pointer;
delete[] Pointer;
The above code would proceed to create a new array, store it in a pointer and retrieve the memory address of the array before finally deleting the array.
So let's assume we re-build the pointer and try to access the now deallocated array:
Pointer = ( uint32* ) MemAddr;
Pointer[ 0 ] = 0;
Based on the above snippets of code, how would I check "Pointer" after rebuilding the memory to check if the rebuilt memory has actually been deallocated. Without a check we'd get an exception error.
A bit of detail on why I am trying this:
Before thinking up how to do this, I was storing the addresses in a list and check the list for the addresses to see if they existed or not. However this requires an O(n) search, which isn't exactly what I am wanting. So instead if I used a check for deallocation method, I can go for an O(1) time check and reduce the total time it would take to check for memory allocation/deallocation.
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Jan 23, 2014
I have created a prompt which prompts the user for an integer and I have set up a loop to check for if it is an integer or not. My "bug" is that a user can enter an "integer" and "space" and "enter" and it does not give any error and assumes that "All is FINE!". I have gotten the value from the ascii table of 'SPACE' and put it as a check in my parameter of while, but it does not work.
Here is my code:
int x, y, boolean, i;
char buff[256];
printf("Enter the first integer value: ");
scanf("%s", buff);
i = 0;
boolean = 0; //initializing our boolean var that will eventually decide if we have an error or not
[code]....
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Mar 6, 2014
Suppose you have a templated class, such as
template <typename T>
class Matrix {
// some stuff and some methods
};
and let's say that you have some methods that need to do some type-dependent stuff, like, for example,
template <typename T>
Matrix<T> Matrix<T>::transpose() const {
// get this->rowCount, this->columnCount
// create a Matrix that has rowCount amount of columns and columnCount amount of rows
// copy (*this)[j][k] to theMatrix[k][j] (for all of the entries in *this)
// if the entries are complex, take the complex conjugate of them all
}
Would it be good practice to check explicitly for the typename parameter (or is this, somehow, defeating the purpose of templates)? std::cout << "I know that this is a design question, but it needs to be asked... ";
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Mar 1, 2015
I'm playing around with parts of code and am coming across some errors. Most of my concern is related to strtok(). I've used it before but with a char* named token. I used a while loop to continuously check whether token was equal to NULL. In the following code, however, there aren't any checks. I was wondering if that is why this code prints (null) while running. Also, I would like to know if it is possible to read input like this code attempts to do - assigning tokens to each variable one after the other.
The format of the input:
Zucchini, Squash, pound
Yellow, Squash, pound
Tomatoes, Ugly Ripe, each
#include <stdio.h>
#include <stdlib.h>
[code]....
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Oct 13, 2013
Assuming I have a list of pointers to a generic type T:
#include <vector>
//...
list<T*> myList;
Now assuming I want to go on the list, and if T's type is matched to the type I'm looking for, then cast it to this type and do something. List shown here:
list<T*>:: const_iterator iter= myList.begin();
for(; iter!=myList.end(); ++iter){
if( typeid(*iter)==typeid(Something*)) //RUN-TIME ERROR
dynamic_cast<Something*>(*iter)->DoSomething();
}
how do I fix this run-time error?
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Feb 14, 2014
#include <iostream>
using namespace std;
int main(){
int x;
cout << "Enter character:";
cin >> x;
[Code] ....
If i type in:
+
How come it says that "this is not addition?
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Jun 5, 2013
I have this table Profile which has fields with user_Id and regNo and I want to check first if id and email are already exists before proceed to inserting datas. In my codes, I am able to validate only one row (either id or reg number), but if I am going to validate the two of them, it gives me an error, saying "Must declare the scalar variable @userid". I dont know if it is with my select that is wrong or something in my codes
SqlConnection con = new SqlConnection("Data Source=GATE-PCSQLEXPRESS;Initial Catalog=dbProfile;Integrated Security=True");
con.Open();
SqlCommand cmdd = new SqlCommand("select * from Profile where user_Id = @userid AND RegNo = @reg", con);
SqlParameter param = new SqlParameter();
[Code] .....
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Dec 21, 2012
To calculate line slope I am using formula ,
line_slope = (meanxy - (meanx * meany)) / (meanyy) - (meany * meany));
All the variables are floats.
How to check whether the denominator .. (meanyy)- (meany * meany)) is zero ? Cause its float.
can I check with ..
float f1 = (meanyy) - (meany * meany) ;
if (f1 == 0.0) ..
Will this work surely ? I am using this formula in project based on winXP but it survived. As soon as I ported the code on DPMI based code , I observed a system hang after some time if all the points I supply are (0,0) while drawing a line.
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Apr 9, 2013
I' used to check if my streams are properly opened with a simple:
Code:
if (!file)
std::cout<<"Error message";
However I just realized this is only a valid test if they are initialized with a wrong string and when I tested it:
Code:
int main() {
ifstream f_one("input.txt");
ifstream f_two("not_a_file.txt");
ifstream f_three;
[Code] ....
I didn't get the f_three error message, only the f_two.
how should I check my streams in order to prevent this?
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Mar 9, 2013
I am using Dev C++ on a windows computer.
In my code, the user enters the name of a city, and then according to what city it is, the program displays the coordinates of that city
I can't find a way of figuring out and checking which city the user has entered so the code can displays its appropriate latitude and longitude.
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