Add compiler flags that should show inlined functions when enabling debug

Should work with Intel ICC and GCC.

Status changed to merged

mentioned in commit 5126b8ed

Actually, I seem to have an issue on cosma-5 with gcc:

git clone git@gitlab.cosma.dur.ac.uk:swift/swiftsim.git
cd swiftsim
module load swift/c5/gcc/intelmpi/5.1.3
./autogen.sh
./configure --disable-vec --enable-debug

leading to

<snip>
hecking whether AVX512-F is supported by the processor... no
checking whether AVX512-CD is supported by the processor... no
checking whether AVX512-PF is supported by the processor... no
checking whether AVX512-ER is supported by the processor... no
checking whether AVX512-VL is supported by the processor... no
checking whether AVX512-BW is supported by the processor... no
checking whether AVX512-DQ is supported by the processor... no
checking whether AVX512-IFMA is supported by the processor... no
checking whether AVX512-VBMI is supported by the processor... no
disabled GCC vectorization
checking for a BSD-compatible install... /usr/bin/install -c
checking whether make sets $(MAKE)... (cached) yes
checking for ANSI C header files... (cached) yes
checking for sqrt in -lm... no
configure: error: something is wrong with the math library!

It works on my laptop with gcc 5.4.0.

Sorry, just noticed that myself. Will commit a fix.

mentioned in merge request !262 (merged)

mentioned in commit 58d36dd4