This should be a classic "Please read the manual" question, but I can't seem to find where in the GCC manual it states its data sizes http://gcc.gnu.org/onlinedocs/ Surely there must be a simple table somewhere - like in the C51 manual: http://www.keil.com/support/man/docs/c51/c51_ap_datastorage.htm
"This should be a classic "Please read the manual" question, but I can't seem to find where in the GCC manual it states its data sizes" Somewhere in those GCC docs, it states conformance to the ARM ABIs, which are available here: http://www.arm.com/products/DevTools/ABI.html I think you specifically want Chapter 7 of: http://www.arm.com/miscPDFs/8031.pdf Hey, check out the name of that PDF ;-)