CIS2750 Midterm Exam With
Complete Solution
-o, -Wall, -pedantic, -std=c99 in makefiles what do each of these do -
ANSWER -o: names the executable/output file
-Wall: activates all warnings
-pedantic: really picking with warnings
-std=c99: uses c99 standard for compiling
-E in makefile - ANSWER processor translates directives into more c code,
inserts all code from stdio.h
-c in makefile - ANSWER compiler converts c code into object code
makefile linker - ANSWER connects object code to standard or non standard
libraries
how to link and create libraries in makefile - ANSWER link library -l(name of
library)
-L. provides path to library that isn't in defaults
-fPIC in makefile - ANSWER creates position independent code, doesn't
assume where in memory your code will be
-shared in makefile - ANSWER creates a shared library
.so
what does export LD_LIBRARY_PATH='pwd' do - ANSWER tells os where the
, .so file is at runtime
advantages of making - ANSWER makes repeated compilation easier
all in makefile - ANSWER lists everything you want the make command to
create by default
clean in makefile - ANSWER deletes intermediate files
make file rule format - ANSWER target: dependencies
command
target: what you want to create
dependencies: what you need to run command
command any unix command (gcc or clang)
qsort - ANSWER function that sorts an array of nell objects, intial member is
pointed to by the base, size is specified by the width
contents of array base are sorted in ascending order according to comparison
function pointed to by function pointers which requires two arguments the
objects being compared
why does qsort use function pointers - ANSWER generic sorter, don't have to
specify types, can pass in any type of object
are scripting languages interpreted or compiled and why - ANSWER
Complete Solution
-o, -Wall, -pedantic, -std=c99 in makefiles what do each of these do -
ANSWER -o: names the executable/output file
-Wall: activates all warnings
-pedantic: really picking with warnings
-std=c99: uses c99 standard for compiling
-E in makefile - ANSWER processor translates directives into more c code,
inserts all code from stdio.h
-c in makefile - ANSWER compiler converts c code into object code
makefile linker - ANSWER connects object code to standard or non standard
libraries
how to link and create libraries in makefile - ANSWER link library -l(name of
library)
-L. provides path to library that isn't in defaults
-fPIC in makefile - ANSWER creates position independent code, doesn't
assume where in memory your code will be
-shared in makefile - ANSWER creates a shared library
.so
what does export LD_LIBRARY_PATH='pwd' do - ANSWER tells os where the
, .so file is at runtime
advantages of making - ANSWER makes repeated compilation easier
all in makefile - ANSWER lists everything you want the make command to
create by default
clean in makefile - ANSWER deletes intermediate files
make file rule format - ANSWER target: dependencies
command
target: what you want to create
dependencies: what you need to run command
command any unix command (gcc or clang)
qsort - ANSWER function that sorts an array of nell objects, intial member is
pointed to by the base, size is specified by the width
contents of array base are sorted in ascending order according to comparison
function pointed to by function pointers which requires two arguments the
objects being compared
why does qsort use function pointers - ANSWER generic sorter, don't have to
specify types, can pass in any type of object
are scripting languages interpreted or compiled and why - ANSWER
