Mathieu questions

Mathieu answers

• How to recall select after timeout in C?
• link to external library with g++
• How can I find the corresponding .h file which includes the "cacheflush" function?
• @echo in Makefile always causes error " *** missing separator. Stop."
• Why return does not exit a process in xv6?
• c code to get secondary storage size
• printf() - prints wrong order. Works when printed separately
• printf: how to align numbers on decimal point
• puts and printf in C
• crosstool-ng cant fetch linux tarball