I am trying to build gcc 4.7.2 using a custom prefix $PREFIX I have built and installed all the prerequisites into my prefix location, and then successfully configured, built and installed gcc. The problem that I now have is that $PREFIX is not in the library search path, and therefore the shared libraries ca…
Tag: gcc
why am i not able to declare sigset_t with std=c99?
If i compile the below program with std=c99, i get an error, but the program compiles fine without the c99 flag. Why? Answer Because sigset_t is not part of <signal.h> in standard C and you requested strict standards compatibility with -std=c99. That is, a strictly standard C program can do: and expect …
GCC 4.7.2 requires ppl?
I’m trying to configure GCC 4.7.2, but it’s failing with configure: error: Unable to find a usable PPL I’ve looked in GCC prerequisites page and PPL isn’t mentioned anywhere. I’m using CLooG 0.17.0, which uses ISL, and as such no longer requires PPL (as far as I can tell) Is ther…
What is the performance penalty of C++11 thread_local variables in GCC 4.8?
From the GCC 4.8 draft changelog: G++ now implements the C++11 thread_local keyword; this differs from the GNU __thread keyword primarily in that it allows dynamic initialization and destruction semantics. Unfortunately, this support requires a run-time penalty for references to non-function-local thread_loca…
What does the GCC error message, “Error: unsupported for `mov'”, mean?
I am just trying to compile some simple example code I typed in from a book, and GCC gives me the above error. Here’s my code: The code is supposed to invoke the syslog() system call to read the last 128 bytes from the kernel printk() ring buffer. Here is some information about my OS and system configur…
How to print the address of a function?
I let gcc compile the following example using -Wall -pedantic: I get: Line 5 made my change the code like in line 6. What am I missing to remove the warning when printing a function’s address? Answer This is essentially the only portable way to print a function pointer.
Ask GDB to list all functions in a program
How can you list all functions in a program with GDB? Answer info functions prints the names and data types of all defined functions. See 16 Examining the Symbol Table.
Configuring for a compiler different than the default while running configure
I am compiling the glibc library. Before I could do that, I need to run configure. However, for compiling glibc, I need to use the gcc compiler which is not the default compiler on the machine. The manual says the following. Now my problem is that I don’t have any administrative rights on that machine. …
Where is PATH_MAX defined in Linux?
Which header file should I invoke with #include to be able to use PATH_MAX as an int for sizing a string? I want to be able to declare: But when I do so my compiler (Clang/LLVM on Linux) issues the following error: I tried doing a google search but still no luck. #include <limits.h> Does NOT fix the pro…
Need a simple Linux C++ IDE (Android NDK) [closed]
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. We don’t allow questions seeking recommendations for books, tools, software libraries, and more. You can edit the question so it can be answered with facts and citations. Closed 2 years ago. Improve this ques…