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/*******************************************************************/
/* slibtool: a skinny libtool implementation, written in C */
/* Copyright (C) 2016--2021 SysDeer Technologies, LLC */
/* Released under the Standard MIT License; see COPYING.SLIBTOOL. */
/*******************************************************************/
#include <string.h>
#include <stdbool.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/stat.h>
#include <slibtool/slibtool.h>
#include "slibtool_spawn_impl.h"
#include "slibtool_mkdir_impl.h"
#include "slibtool_errinfo_impl.h"
#include "slibtool_metafile_impl.h"
static int slbt_exec_compile_remove_file(
const struct slbt_driver_ctx * dctx,
struct slbt_exec_ctx * ectx,
const char * target)
{
int fdcwd;
(void)ectx;
/* fdcwd */
fdcwd = slbt_driver_fdcwd(dctx);
/* remove target (if any) */
if (!unlinkat(fdcwd,target,0) || (errno == ENOENT))
return 0;
return SLBT_SYSTEM_ERROR(dctx,0);
}
static int slbt_exec_compile_finalize_argument_vector(
const struct slbt_driver_ctx * dctx,
struct slbt_exec_ctx * ectx)
{
char * sargv[1024];
char ** sargvbuf;
char ** base;
char ** parg;
char ** aarg;
char ** aargv;
char ** cap;
char ** src;
char ** dst;
char * ccwrap;
/* vector size */
base = ectx->argv;
parg = ectx->argv;
for (; *parg; )
parg++;
/* buffer */
if (parg - base < 1024) {
aargv = sargv;
aarg = aargv;
sargvbuf = 0;
} else if (!(sargvbuf = calloc(parg-base+1,sizeof(char *)))) {
return SLBT_SYSTEM_ERROR(dctx,0);
} else {
aargv = sargvbuf;
aarg = aargv;
}
/* (program name) */
parg = &base[1];
/* split object args from all other args, record output */
/* annotation, and remove redundant -l arguments */
for (; *parg; ) {
if (ectx->lout[0] == parg) {
ectx->lout[0] = &aarg[0];
ectx->lout[1] = &aarg[1];
}
if (ectx->mout[0] == parg) {
ectx->mout[0] = &aarg[0];
ectx->mout[1] = &aarg[1];
}
/* placeholder argument? */
if (!strncmp(*parg,"-USLIBTOOL_PLACEHOLDER_",23)) {
parg++;
} else {
*aarg++ = *parg++;
}
}
/* program name, ccwrap */
if ((ccwrap = (char *)dctx->cctx->ccwrap)) {
base[1] = base[0];
base[0] = ccwrap;
base++;
}
/* join all other args */
src = aargv;
cap = aarg;
dst = &base[1];
for (; src<cap; )
*dst++ = *src++;
/* properly null-terminate argv, accounting for redundant arguments */
*dst = 0;
/* output annotation */
if (ectx->lout[0]) {
ectx->lout[0] = &base[1] + (ectx->lout[0] - aargv);
ectx->lout[1] = ectx->lout[0] + 1;
}
if (ectx->mout[0]) {
ectx->mout[0] = &base[1] + (ectx->mout[0] - aargv);
ectx->mout[1] = ectx->mout[0] + 1;
}
/* all done */
if (sargvbuf)
free(sargvbuf);
return 0;
}
int slbt_exec_compile(
const struct slbt_driver_ctx * dctx,
struct slbt_exec_ctx * ectx)
{
int ret;
char * fpic;
char * ccwrap;
struct slbt_exec_ctx * actx = 0;
const struct slbt_common_ctx * cctx = dctx->cctx;
/* dry run */
if (cctx->drvflags & SLBT_DRIVER_DRY_RUN)
return 0;
/* context */
if (ectx)
slbt_reset_placeholders(ectx);
else if ((ret = slbt_get_exec_ctx(dctx,&ectx)))
return ret;
else
actx = ectx;
/* remove old .lo wrapper */
if (slbt_exec_compile_remove_file(dctx,ectx,ectx->ltobjname))
return SLBT_NESTED_ERROR(dctx);
/* .libs directory */
if (cctx->drvflags & SLBT_DRIVER_SHARED)
if (slbt_mkdir(dctx,ectx->ldirname)) {
ret = SLBT_SYSTEM_ERROR(dctx,ectx->ldirname);
slbt_free_exec_ctx(actx);
return ret;
}
/* compile mode */
ccwrap = (char *)cctx->ccwrap;
ectx->program = ccwrap ? ccwrap : ectx->compiler;
ectx->argv = ectx->cargv;
/* -fpic */
switch (cctx->tag) {
case SLBT_TAG_CC:
case SLBT_TAG_CXX:
case SLBT_TAG_F77:
fpic = cctx->settings.picswitch
? cctx->settings.picswitch
: *ectx->fpic;
break;
default:
fpic = *ectx->fpic;
}
/* shared library object */
if (cctx->drvflags & SLBT_DRIVER_SHARED) {
if (!(cctx->drvflags & SLBT_DRIVER_ANTI_PIC)) {
*ectx->dpic = "-DPIC";
*ectx->fpic = fpic;
}
*ectx->lout[0] = "-o";
*ectx->lout[1] = ectx->lobjname;
if (slbt_exec_compile_finalize_argument_vector(dctx,ectx))
return SLBT_NESTED_ERROR(dctx);
if (!(cctx->drvflags & SLBT_DRIVER_SILENT)) {
if (slbt_output_compile(dctx,ectx)) {
slbt_free_exec_ctx(actx);
return SLBT_NESTED_ERROR(dctx);
}
}
if ((slbt_spawn(ectx,true) < 0) && (ectx->pid < 0)) {
slbt_free_exec_ctx(actx);
return SLBT_SYSTEM_ERROR(dctx,0);
} else if (ectx->exitcode) {
slbt_free_exec_ctx(actx);
return SLBT_CUSTOM_ERROR(dctx,SLBT_ERR_COMPILE_ERROR);
}
if (cctx->drvflags & SLBT_DRIVER_STATIC)
slbt_reset_argvector(ectx);
}
/* static archive object */
if (cctx->drvflags & SLBT_DRIVER_STATIC) {
slbt_reset_placeholders(ectx);
if (cctx->drvflags & SLBT_DRIVER_PRO_PIC) {
*ectx->dpic = "-DPIC";
*ectx->fpic = fpic;
}
*ectx->lout[0] = "-o";
*ectx->lout[1] = ectx->aobjname;
if (slbt_exec_compile_finalize_argument_vector(dctx,ectx))
return SLBT_NESTED_ERROR(dctx);
if (!(cctx->drvflags & SLBT_DRIVER_SILENT)) {
if (slbt_output_compile(dctx,ectx)) {
slbt_free_exec_ctx(actx);
return SLBT_NESTED_ERROR(dctx);
}
}
if ((slbt_spawn(ectx,true) < 0) && (ectx->pid < 0)) {
slbt_free_exec_ctx(actx);
return SLBT_SYSTEM_ERROR(dctx,0);
} else if (ectx->exitcode) {
slbt_free_exec_ctx(actx);
return SLBT_CUSTOM_ERROR(dctx,SLBT_ERR_COMPILE_ERROR);
}
}
ret = slbt_create_object_wrapper(dctx,ectx);
slbt_free_exec_ctx(actx);
return ret ? SLBT_NESTED_ERROR(dctx) : 0;
}
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