Add roaring64 to amalgamation script

[SLieve]

Follow-up from PR #534. Fixes #543.

Tested:

$ ./amalgamation.sh
We are about to amalgamate all CRoaring files into one source file.
For rationale, see: https://www.sqlite.org/amalgamation.html
and: https://en.wikipedia.org/wiki/Single_Compilation_Unit

Creating roaring.h...
Creating roaring.c...
Creating amalgamation_demo.c...
Creating roaring.hh...
Creating amalgamation_demo.cpp...

Files have been written to current directory: /home/soerian/repos/CRoaring
-rw-rw-r-- 1 soerian soerian    825 Jan  9 09:28 amalgamation_demo.c
-rw-rw-r-- 1 soerian soerian   2526 Jan  9 09:28 amalgamation_demo.cpp
-rw-rw-r-- 1 soerian soerian 951998 Jan  9 09:28 roaring.c
-rw-rw-r-- 1 soerian soerian  85995 Jan  9 09:28 roaring.h
-rw-rw-r-- 1 soerian soerian 105913 Jan  9 09:28 roaring.hh

The interface is found in the file 'include/roaring/roaring.h'.

For C, try:
cc -O3 -std=c11  -o amalgamation_demo amalgamation_demo.c  && ./amalgamation_demo

For C++, try:
c++ -O3 -std=c++11 -o amalgamation_demo amalgamation_demo.cpp  && ./amalgamation_demo

You can build a shared library with the following command:
cc -O3 -std=c11 -shared -o libroaring.so -fPIC roaring.c

$ cc -O3 -std=c11  -o amalgamation_demo amalgamation_demo.c  && ./amalgamation_demo
cardinality = 900
cardinality (64-bit) = 900
1000

[lemire]

!!! Great.

[Dr-Emann]

@SLieve Seems like the build for the C++ example for the amalgamation demo is broken with these changes. Looks like all places where C++ requires casting from void *

Output

$ ./amalgamation.sh
We are about to amalgamate all CRoaring files into one source file.
For rationale, see: https://www.sqlite.org/amalgamation.html
and: https://en.wikipedia.org/wiki/Single_Compilation_Unit

Creating roaring.h...
Creating roaring.c...
Creating amalgamation_demo.c...
Creating roaring.hh...
Creating amalgamation_demo.cpp...

Files have been written to current directory: /Users/zach/Development/CRoaring
-rw-r--r--  1 zach  staff     587 Jan  8 20:44 amalgamation_demo.c
-rw-r--r--  1 zach  staff    2526 Jan  8 20:44 amalgamation_demo.cpp
-rw-r--r--  1 zach  staff  951998 Jan  8 20:44 roaring.c
-rw-r--r--  1 zach  staff   85995 Jan  8 20:44 roaring.h
-rw-r--r--  1 zach  staff  105913 Jan  8 20:44 roaring.hh

The interface is found in the file 'include/roaring/roaring.h'.

For C, try:
cc -O3 -std=c11  -o amalgamation_demo amalgamation_demo.c  && ./amalgamation_demo

For C++, try:
c++ -O3 -std=c++11 -o amalgamation_demo amalgamation_demo.cpp  && ./amalgamation_demo

You can build a shared library with the following command:
cc  -O3 -std=c11 -shared -o libroaring.dylib -fPIC roaring.c

$ c++ -O3 -std=c++11 -o amalgamation_demo amalgamation_demo.cpp && ./amalgamation_demo
./roaring.c:9206:18: error: cannot initialize a variable of type 'art_node4_t *' (aka 'roaring::internal::art_node4_s *') with an rvalue of type 'void *'
    art_node4_t *node = roaring_malloc(sizeof(art_node4_t));
                 ^      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./roaring.c:9368:19: error: cannot initialize a variable of type 'art_node16_t *' (aka 'roaring::internal::art_node16_s *') with an rvalue of type 'void *'
    art_node16_t *node = roaring_malloc(sizeof(art_node16_t));
                  ^      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./roaring.c:9517:19: error: cannot initialize a variable of type 'art_node48_t *' (aka 'roaring::internal::art_node48_s *') with an rvalue of type 'void *'
    art_node48_t *node = roaring_malloc(sizeof(art_node48_t));
                  ^      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./roaring.c:9660:20: error: cannot initialize a variable of type 'art_node256_t *' (aka 'roaring::internal::art_node256_s *') with an rvalue of type 'void *'
    art_node256_t *node = roaring_malloc(sizeof(art_node256_t));
                   ^      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./roaring.c:22046:13: error: cannot initialize a variable of type 'leaf_t *' (aka 'roaring::api::roaring64_leaf_s *') with an rvalue of type 'void *'
    leaf_t *leaf = roaring_malloc(sizeof(leaf_t));
            ^      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./roaring.c:22053:13: error: cannot initialize a variable of type 'leaf_t *' (aka 'roaring::api::roaring64_leaf_s *') with an rvalue of type 'void *'
    leaf_t *result_leaf = roaring_malloc(sizeof(leaf_t));
            ^             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./roaring.c:22069:25: error: cannot initialize a variable of type 'roaring64_bitmap_t *' (aka 'roaring::api::roaring64_bitmap_s *') with an rvalue of type 'void *'
    roaring64_bitmap_t *r = roaring_malloc(sizeof(roaring64_bitmap_t));
                        ^   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./roaring.c:22750:21: error: cannot initialize a variable of type 'leaf_t *' (aka 'roaring::api::roaring64_leaf_s *') with an rvalue of type 'void *'
            leaf_t *result_leaf = roaring_malloc(sizeof(leaf_t));
                    ^             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./roaring.c:22948:25: error: cannot initialize a variable of type 'leaf_t *' (aka 'roaring::api::roaring64_leaf_s *') with an rvalue of type 'void *'
                leaf_t *result_leaf = roaring_malloc(sizeof(leaf_t));
                        ^             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./roaring.c:23064:25: error: cannot initialize a variable of type 'leaf_t *' (aka 'roaring::api::roaring64_leaf_s *') with an rvalue of type 'void *'
                leaf_t *result_leaf = roaring_malloc(sizeof(leaf_t));
                        ^             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./roaring.c:23199:25: error: cannot initialize a variable of type 'leaf_t *' (aka 'roaring::api::roaring64_leaf_s *') with an rvalue of type 'void *'
                leaf_t *result_leaf = roaring_malloc(sizeof(leaf_t));
                        ^             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
11 errors generated.

[SLieve]

@Dr-Emann thanks! #547