74 lines
2.2 KiB
C
74 lines
2.2 KiB
C
/* Updates the given file if any library versions have changed. This
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* is important for systemwide updates, such as sqlite3. */
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#include "config.h"
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#include <ccan/err/err.h>
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#include <ccan/read_write_all/read_write_all.h>
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#include <ccan/tal/grab_file/grab_file.h>
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#include <ccan/tal/str/str.h>
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#include <errno.h>
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#include <fcntl.h>
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#if HAVE_SQLITE3
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# include <sqlite3.h>
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# define IF_SQLITE3(...) __VA_ARGS__
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#else
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# define IF_SQLITE3(...)
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#endif
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#include <unistd.h>
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#include <zlib.h>
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static const char template[] =
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"/* Generated file by tools/headerversions, do not edit! */\n"
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IF_SQLITE3("/* SQLITE3 version: %u */\n")
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"/* ZLIB version: %s */\n"
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"#include <ccan/err/err.h>\n"
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IF_SQLITE3("#include <sqlite3.h>\n")
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"#include <zlib.h>\n"
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"\n"
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"static inline void check_linked_library_versions(void)\n"
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"{\n"
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IF_SQLITE3(
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" /* Require at least the version we compiled with. */"
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" if (SQLITE_VERSION_NUMBER > sqlite3_libversion_number())\n"
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" errx(1, \"SQLITE version mismatch: compiled %%u, now %%u\",\n"
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" SQLITE_VERSION_NUMBER, sqlite3_libversion_number());\n"
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" /* Ensure the major version matches. */"
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" if (SQLITE_VERSION_NUMBER + 1000000 < sqlite3_libversion_number())\n"
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" errx(1, \"SQLITE major version mismatch: compiled %%u, now %%u\",\n"
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" SQLITE_VERSION_NUMBER, sqlite3_libversion_number());\n"
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)
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" /* zlib documents that first char alters ABI. Kudos! */\n"
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" if (zlibVersion()[0] != ZLIB_VERSION[0])\n"
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" errx(1, \"zlib version mismatch: compiled %%s, now %%s\",\n"
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" ZLIB_VERSION, zlibVersion());\n"
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"}\n";
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int main(int argc, char *argv[])
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{
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char *file, *new;
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/* We don't bother with setup_locale(); we're a build tool */
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err_set_progname(argv[0]);
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if (argc != 2)
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errx(1, "Usage: %s <versionheader>", argv[0]);
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file = grab_file(NULL, argv[1]);
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if (!file && errno != ENOENT)
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err(1, "Reading %s", argv[1]);
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new = tal_fmt(NULL, template,
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IF_SQLITE3(sqlite3_libversion_number(),)
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zlibVersion());
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if (!file || !streq(new, file)) {
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int fd = open(argv[1], O_TRUNC|O_WRONLY|O_CREAT, 0666);
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if (fd < 0)
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err(1, "Writing %s", argv[1]);
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if (!write_all(fd, new, strlen(new)))
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err(1, "Writing to %s", argv[1]);
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close(fd);
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}
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tal_free(new);
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tal_free(file);
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return 0;
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}
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