Build of datemath with android toolchain

# [tuscan]
# Server = file:///var/cache/pacman/pkg/

# :: Synchronizing package databases...
# downloading tuscan.db...

# /toolchain_root/arm-linux-androideabi --> /sysroot/arm-linux-androideabi
# /toolchain_root/COPYING3.LIB --> /sysroot/COPYING3.LIB
# /toolchain_root/sysroot --> /sysroot/sysroot
# /toolchain_root/COPYING.RUNTIME --> /sysroot/COPYING.RUNTIME
# /toolchain_root/lib --> /sysroot/lib
# /toolchain_root/SOURCES --> /sysroot/SOURCES
# /toolchain_root/lib64 --> /sysroot/lib64
# /toolchain_root/share --> /sysroot/share
# /toolchain_root/bin --> /sysroot/bin
# /toolchain_root/COPYING --> /sysroot/COPYING
# /toolchain_root/COPYING3 --> /sysroot/COPYING3
# /toolchain_root/COPYING.LIB --> /sysroot/COPYING.LIB
# /toolchain_root/include --> /sysroot/include
# /toolchain_root/libexec --> /sysroot/libexec

# ==> Making package: datemath 2.0.10-5 (Tue Apr 4 19:39:37 UTC 2017)
# ==> Checking runtime dependencies...
# ==> Checking buildtime dependencies...
# ==> WARNING: Using existing $srcdir/ tree
# ==> Starting build()...
# File ./util.c is read-only; trying to patch anyway
# patching file ./util.c
# gcc -W -Wall -pedantic -c -o datemath.o datemath.c
# bison --defines --output=gram.c gram.y
# gcc -W -Wall -pedantic -c -o util.o util.c
# flex -t lex.l > lex.c
# cc1: error: no include path in which to search for stdc-predef.h
# datemath.c:110:19: error: no include path in which to search for stdio.h
# #include
# ^
# datemath.c:111:20: error: no include path in which to search for stdlib.h
# #include
# ^
# datemath.c:112:20: error: no include path in which to search for unistd.h
# #include
# ^
# datemath.c:113:20: error: no include path in which to search for string.h
# #include
# ^
# datemath.c:114:20: error: no include path in which to search for malloc.h
# #include
# ^
# datemath.c:120:24: error: 'NULL' undeclared here (not in a function)
# const char *ProgName = NULL;
# ^
# datemath.c: In function 'main':
# datemath.c:135:2: warning: implicit declaration of function 'setbuf' [-Wimplicit-function-declaration]
# setbuf(stdout, (char *)0);
# ^
# datemath.c:135:9: error: 'stdout' undeclared (first use in this function)
# setbuf(stdout, (char *)0);
# ^
# datemath.c:135:9: note: each undeclared identifier is reported only once for each function it appears in
# datemath.c:137:2: warning: implicit declaration of function 'getopt' [-Wimplicit-function-declaration]
# while ( (c = getopt(argc, argv, "VL9:24C")) != EOF )
# ^
# datemath.c:137:49: error: 'EOF' undeclared (first use in this function)
# while ( (c = getopt(argc, argv, "VL9:24C")) != EOF )
# ^
# datemath.c:157:4: warning: implicit declaration of function 'atoi' [-Wimplicit-function-declaration]
# century19_year = atoi(optarg);
# ^
# datemath.c:157:26: error: 'optarg' undeclared (first use in this function)
# century19_year = atoi(optarg);
# ^
# datemath.c:165:4: warning: implicit declaration of function 'fprintf' [-Wimplicit-function-declaration]
# fprintf(stderr, "%s\n", Version);
# ^
# datemath.c:165:4: warning: incompatible implicit declaration of built-in function 'fprintf' [enabled by default]
# datemath.c:165:12: error: 'stderr' undeclared (first use in this function)
# fprintf(stderr, "%s\n", Version);
# ^
# datemath.c:166:4: warning: implicit declaration of function 'exit' [-Wimplicit-function-declaration]
# exit(EXIT_SUCCESS);
# ^
# datemath.c:166:4: warning: incompatible implicit declaration of built-in function 'exit' [enabled by default]
# datemath.c:178:11: error: 'optind' undeclared (first use in this function)
# for (i = optind; i < argc; i++ )
# ^
# datemath.c:180:3: warning: implicit declaration of function 'strlen' [-Wimplicit-function-declaration]
# len += strlen(argv[i]) + 1;
# ^
# datemath.c:180:10: warning: incompatible implicit declaration of built-in function 'strlen' [enabled by default]
# len += strlen(argv[i]) + 1;
# ^
# datemath.c:185:3: warning: incompatible implicit declaration of built-in function 'fprintf' [enabled by default]
# fprintf(stderr, "ERROR: missing datemath expression\n");
# ^
# datemath.c:192:2: warning: implicit declaration of function 'malloc' [-Wimplicit-function-declaration]
# if ( (exprbuf = malloc(len)) == 0 )
# ^
# datemath.c:192:18: warning: incompatible implicit declaration of built-in function 'malloc' [enabled by default]
# if ( (exprbuf = malloc(len)) == 0 )
# ^
# datemath.c:197:3: warning: implicit declaration of function 'strcat' [-Wimplicit-function-declaration]
# strcat(exprbuf, argv[optind++]);
# ^
# datemath.c:197:3: warning: incompatible implicit declaration of built-in function 'strcat' [enabled by default]
# datemath.c:208:4: warning: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
# printf("got token %d [%s]\n", tok, yytext);
# ^
# datemath.c:208:4: warning: incompatible implicit declaration of built-in function 'printf' [enabled by default]
# datemath.c:210:3: warning: incompatible implicit declaration of built-in function 'exit' [enabled by default]
# exit(EXIT_SUCCESS);
# ^
# datemath.c:215:3: warning: incompatible implicit declaration of built-in function 'exit' [enabled by default]
# exit( yyparse() == 0 ? EXIT_SUCCESS : EXIT_FAILURE);
# ^
# datemath.c: In function 'usage':
# datemath.c:246:2: warning: incompatible implicit declaration of built-in function 'fprintf' [enabled by default]
# fprintf(stderr, "%s\n\n", Version);
# ^
# datemath.c:246:10: error: 'stderr' undeclared (first use in this function)
# fprintf(stderr, "%s\n\n", Version);
# ^
# datemath.c:254:2: warning: incompatible implicit declaration of built-in function 'exit' [enabled by default]
# exit(EXIT_FAILURE);
# ^
# make: *** [: datemath.o] Error 1
# make: *** Waiting for unfinished jobs....
# cc1: error: no include path in which to search for stdc-predef.h
# util.c:12:19: error: no include path in which to search for stdio.h
# #include
# ^
# util.c:13:20: error: no include path in which to search for assert.h
# #include
# ^
# util.c:14:20: error: no include path in which to search for stdarg.h
# #include
# ^
# util.c:15:20: error: no include path in which to search for stdlib.h
# #include
# ^
# util.c:16:20: error: no include path in which to search for string.h
# #include
# ^
# util.c:17:19: error: no include path in which to search for ctype.h
# #include
# ^
# util.c: In function 'die':
# util.c:109:1: error: unknown type name 'va_list'
# va_list args;
# ^
# util.c:111:2: warning: implicit declaration of function 'va_start' [-Wimplicit-function-declaration]
# va_start(args, format);
# ^
# util.c:114:3: warning: implicit declaration of function 'fprintf' [-Wimplicit-function-declaration]
# (void)fprintf(stderr, "%s: ", ProgName);
# ^
# util.c:114:9: warning: incompatible implicit declaration of built-in function 'fprintf' [enabled by default]
# (void)fprintf(stderr, "%s: ", ProgName);
# ^
# util.c:114:17: error: 'stderr' undeclared (first use in this function)
# (void)fprintf(stderr, "%s: ", ProgName);
# ^
# util.c:114:17: note: each undeclared identifier is reported only once for each function it appears in
# util.c:116:2: warning: implicit declaration of function 'vfprintf' [-Wimplicit-function-declaration]
# vfprintf(stderr, format, args);
# ^
# util.c:117:2: warning: implicit declaration of function 'fputc' [-Wimplicit-function-declaration]
# fputc('\n', stderr);
# ^
# util.c:119:2: warning: implicit declaration of function 'va_end' [-Wimplicit-function-declaration]
# va_end(args);
# ^
# util.c:121:2: warning: implicit declaration of function 'exit' [-Wimplicit-function-declaration]
# exit(EXIT_FAILURE);
# ^
# util.c:121:2: warning: incompatible implicit declaration of built-in function 'exit' [enabled by default]
# util.c: In function 'strlower':
# util.c:194:2: warning: implicit declaration of function 'assert' [-Wimplicit-function-declaration]
# assert(s != 0);
# ^
# util.c:198:3: warning: implicit declaration of function 'isupper' [-Wimplicit-function-declaration]
# if (isupper(*s))
# ^
# util.c:199:4: warning: implicit declaration of function 'tolower' [-Wimplicit-function-declaration]
# *s = tolower(*s);
# ^
# make: *** [: util.o] Error 1
# flex: error writing output file
# make: *** [: lex.c] Error 1
# make: *** [Makefile:34: gram.c] Segmentation fault (core dumped)
# rm lex.c
# ==> ERROR: A failure occurred in build().
# Aborting...