mirror of
https://github.com/rtlsdrblog/rtl-sdr-blog.git
synced 2024-12-26 19:08:29 +01:00
81833a1cf6
Although we added a detection mechanism for the presence of the Kernel bug earlier, reading from the incorrectly mapped memory might cause a bus error on some ARM systems. With the overall performance benefit being rather minimal for the data rates of rtl-sdr, disable zero-copy by default.
120 lines
3.2 KiB
Plaintext
120 lines
3.2 KiB
Plaintext
AC_INIT([librtlsdr],
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m4_esyscmd([./git-version-gen .tarball-version]),
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[osmocom-sdr@lists.osmocom.org])
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AM_INIT_AUTOMAKE([dist-bzip2])
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dnl kernel style compile messages
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m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
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dnl checks for programs
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AC_PROG_MAKE_SET
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AC_PROG_CC
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AC_PROG_INSTALL
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AM_PROG_CC_C_O
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LT_INIT
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AC_PROG_LIBTOOL
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PKG_CHECK_MODULES(LIBUSB, libusb-1.0 >= 1.0)
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LIBS="$LIBS $LIBUSB_LIBS"
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CFLAGS="$CFLAGS $LIBUSB_CFLAGS"
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AC_PATH_PROG(DOXYGEN,doxygen,false)
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AM_CONDITIONAL(HAVE_DOXYGEN, test $DOXYGEN != false)
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AC_CONFIG_MACRO_DIR([m4])
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dnl checks for header files
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AC_HEADER_STDC
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AC_CHECK_HEADERS(sys/types.h)
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AC_CHECK_HEADERS(pthread.h,, [AC_MSG_ERROR([pthread.h required])])
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# pc variables
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AC_SUBST(RTLSDR_PC_LIBS,["$LIBS"])
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AC_SUBST(RTLSDR_PC_CFLAGS,["$CFLAGS"])
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dnl checks for required libraries
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dnl pthreads
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AC_CHECK_LIB(pthread, pthread_create, [LIBS="$LIBS -lpthread"])
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dnl libmath (for rtl_fm)
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AC_CHECK_LIB(m, atan2, [LIBS="$LIBS -lm"])
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dnl libmath (for rtl_adsb)
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AC_CHECK_LIB(m, sqrt, [LIBS="$LIBS -lm"])
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dnl libmath (for rtl_power)
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AC_CHECK_LIB(m, atan2, [LIBS="$LIBS -lm"])
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dnl librealtime (for rtl_test)
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AC_CHECK_LIB(rt, clock_gettime, [LIBS="$LIBS -lrt"])
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AC_ARG_ENABLE(sanitize,
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[AS_HELP_STRING([--enable-sanitize], [Compile with address sanitizer enabled], )],
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[sanitize=$enableval], [sanitize="no"])
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if test x"$sanitize" = x"yes"
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then
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CFLAGS="$CFLAGS -fsanitize=address -fsanitize=undefined"
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CPPFLAGS="$CPPFLAGS -fsanitize=address -fsanitize=undefined"
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fi
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AC_ARG_ENABLE(werror,
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[AS_HELP_STRING(
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[--enable-werror],
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[Turn all compiler warnings into errors, with exceptions:
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a) deprecation (allow upstream to mark deprecation without breaking builds);
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b) "#warning" pragmas (allow to remind ourselves of errors without breaking builds)
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]
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)],
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[werror=$enableval], [werror="no"])
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if test x"$werror" = x"yes"
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then
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WERROR_FLAGS="-Werror"
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WERROR_FLAGS+=" -Wno-error=deprecated -Wno-error=deprecated-declarations"
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WERROR_FLAGS+=" -Wno-error=cpp" # "#warning"
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CFLAGS="$CFLAGS $WERROR_FLAGS"
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CPPFLAGS="$CPPFLAGS $WERROR_FLAGS"
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fi
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# The following test is taken from WebKit's webkit.m4
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saved_CFLAGS="$CFLAGS"
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CFLAGS="$CFLAGS -fvisibility=hidden "
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AC_MSG_CHECKING([if ${CC} supports -fvisibility=hidden])
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AC_COMPILE_IFELSE([AC_LANG_SOURCE([char foo;])],
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[ AC_MSG_RESULT([yes])
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SYMBOL_VISIBILITY="-fvisibility=hidden"],
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AC_MSG_RESULT([no]))
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CFLAGS="$saved_CFLAGS"
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AC_SUBST(SYMBOL_VISIBILITY)
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AC_MSG_CHECKING(whether compiler understands -Wall)
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old_CFLAGS="$CFLAGS"
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CFLAGS="$CFLAGS -Wall -Wextra -Wno-unused-parameter -Wno-unused -Wsign-compare -Wdeclaration-after-statement"
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AC_TRY_COMPILE([],[],
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AC_MSG_RESULT(yes),
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AC_MSG_RESULT(no)
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CFLAGS="$old_CFLAGS")
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AC_ARG_ENABLE(driver-detach,
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[ --enable-driver-detach Enable detaching of kernel driver (disabled by default)],
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[if test x$enableval = xyes; then
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CFLAGS="$CFLAGS -DDETACH_KERNEL_DRIVER"
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fi])
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AC_ARG_ENABLE(zerocopy,
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[ --enable-zerocopy Enable usbfs zero-copy support (disabled by default)],
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[if test x$enableval = xyes; then
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CFLAGS="$CFLAGS -DENABLE_ZEROCOPY"
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fi])
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dnl Generate the output
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AC_CONFIG_HEADER(config.h)
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AC_OUTPUT(
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librtlsdr.pc
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include/Makefile
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src/Makefile
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Makefile
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Doxyfile
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)
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