~bl4ckb0ne/boson

ref: 1eebe4d73a4484cd26d3b5569bb7737127c12bd0 boson/src/ninja.c -rw-r--r-- 3.7 KiB
1eebe4d7Simon Zeni improve build process a month ago
                                                                                
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
#include "ninja.h"
#include "parser.h"
#include "log.h"
#include "interpreter.h"
#include "options.h"

#define _XOPEN_SOURCE 700

#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <sys/wait.h>

#define PATH_MAX 4096

static void
write_header(FILE *file)
{
	fprintf(file, "# This file is generated by boson %s\n", VERSION);
	fprintf(file, "# Do not edit by hand\n");

	fprintf(file, "\nninja_required_version = 1.9\n\n");
}

static void
write_compiler(FILE *file)
{
	// TODO check if the compiler given through CC is a valid executable
	char *cc = getenv("CC");
	if (!cc) {
		cc = "cc";
	}

	char cmd[PATH_MAX] = {0};
	snprintf(cmd, sizeof(cmd), "%s > /dev/null 2>&1", cc);

	int rc = system(cmd);
	if (WEXITSTATUS(rc) == 127) {
		fatal("'%s' is not a valid compiler", cc);
	}

	fprintf(file, "cc = %s\n\n", cc);

}

static void
write_cflags(FILE *file, struct context *ctx)
{
	fprintf(file, "cflags =");

	struct options *options = ctx->options;

	switch(options->compiler.c_std) {
	case STD_C89:
		fprintf(file, " -std=c89");
		break;
	case STD_C99:
		fprintf(file, " -std=c99");
		break;
	case STD_C11:
		fprintf(file, " -std=c11");
		break;
	case STD_C17:
		fprintf(file, " -std=c17");
		break;
	case STD_C18:
		fprintf(file, " -std=c18");
		break;
	case STD_C2X:
		fprintf(file, " -std=c2x");
		break;
	default:
		break;
	}


	if (options->core.warning_level >= 1) {
		fprintf(file, " -Wall");
	}
	if (options->core.warning_level >= 2) {
		fprintf(file, " -Wextra");
	}
	if (options->core.warning_level == 3) {
		fprintf(file, " -Wpedantic");
	}

	if (options->core.werror) {
		fprintf(file, " -Werror");
	}

	for (size_t i = 0; i < ctx->project_arguments.n; ++i) {
		fprintf(file, " %s", ctx->project_arguments.data[i]);
	}

	fprintf(file, "\n\n");
}

static void
write_rules(FILE *file)
{
	fprintf(file, "rule cc\n");
	fprintf(file, " command = $cc -MD -MF $out.d $cflags -c $includes -o "
		"$out $in\n");
	fprintf(file, " depfile = $out.d\n");
	fprintf(file, " deps = gcc\n\n");
	fprintf(file, "rule ld\n");
	fprintf(file, " command = $cc $ldflags -o $out $in\n\n");
}

static void
write_targets(FILE *file, struct context *ctx)
{
	struct build_target *target = NULL;
	for(size_t i = 0; i < ctx->build.n; ++i) {
		target = ctx->build.targets[i];

		char includes[PATH_MAX] = {0};
		for (size_t j = 0; j < target->include.n; ++j) {
			int r = snprintf(includes + strlen(includes),
					sizeof(includes) - strlen(includes),
					" -I%s", target->include.paths[j]);
			if (r < 0) {
				fatal("failed to compose inclues");
			}
		}


		char **objs = calloc(1, sizeof(char*));
		size_t n_objs = 0;

		for (size_t j = 0; j < target->source.n; ++j) {
			char *path = target->source.files[j];
			char *obj = strdup(path);
			char *ext = strrchr(obj, '.');
			strcpy(ext, ".o");

			n_objs += 1;
			objs = realloc(objs, n_objs * sizeof(char*));
			objs[n_objs - 1] = obj;

			fprintf(file, "build %s: cc ../%s\n", obj, path);
			fprintf(file, " includes =%s\n\n", includes);
		}

		fprintf(file, "build %s: ld", target->name.data);
		for (size_t j = 0; j < n_objs; ++j) {
			fprintf(file, " %s", objs[j]);
			free(objs[j]);
		}
		free(objs);

		fprintf(file, "\n\n");
	}
}

int
emit_ninja(struct context *ctx, const char *build_dir)
{
	if (mkdir(build_dir, 0775) == -1) {
		report("Build directory already configured");
		return 1;
	}
	info("Build dir: %s", build_dir);

	char ninja_path[PATH_MAX] = {0};
	snprintf(ninja_path, sizeof(ninja_path), "%s/build.ninja", build_dir);

	FILE *ninja = fopen(ninja_path, "w");
	if (!ninja) {
		report("failed to create build.ninja");
		return 1;
	}

	write_header(ninja);
	write_compiler(ninja);
	write_cflags(ninja, ctx);
	write_rules(ninja);
	write_targets(ninja, ctx);

	fclose(ninja);
	return 0;
}