# configure.ac
-# Copyright (c) 2018 Cosmin Truta
+# Copyright (c) 2018-2022 Cosmin Truta
# Copyright (c) 2004-2016 Glenn Randers-Pehrson
# This code is released under the libpng license.
dnl Version number stuff here:
-AC_INIT([libpng],[1.6.37],[png-mng-implement@lists.sourceforge.net])
+AC_INIT([libpng],[1.6.40],[png-mng-implement@lists.sourceforge.net])
AC_CONFIG_MACRO_DIR([scripts])
# libpng does not follow GNU file name conventions (hence 'foreign')
dnl AM_PREREQ([1.11.2])
dnl stop configure from automagically running automake
-PNGLIB_VERSION=1.6.37
+PNGLIB_VERSION=1.6.40
PNGLIB_MAJOR=1
PNGLIB_MINOR=6
-PNGLIB_RELEASE=37
+PNGLIB_RELEASE=40
dnl End of version number stuff
DFNCPP="$CPP"
AC_SUBST(DFNCPP)
-# -Werror cannot be passed to GCC in CFLAGS because configure will fail (it
-# checks the compiler with a program that generates a warning), add the
-# following option to deal with this
+# -Werror cannot be passed to GCC in CFLAGS because configure will fail
+# (it checks the compiler with a program that generates a warning).
+# Add the following option to deal with this:
AC_ARG_VAR(PNG_COPTS,
[additional flags for the C compiler, use this for options that would]
[cause configure itself to fail])
CFLAGS="$sav_CFLAGS"
fi],)
-# For GCC 5 the default mode for C is -std=gnu11 instead of -std=gnu89
-# In pngpriv.h we request just the POSIX 1003.1 and C89 APIs by defining _POSIX_SOURCE to 1
-# This is incompatible with the new default mode, so we test for that and force the
-# "-std=c89" compiler option:
+# For GCC 5 the default mode for C is -std=gnu11 instead of -std=gnu89.
+# In pngpriv.h we request just the POSIX 1003.1 and C89 APIs by defining
+# _POSIX_SOURCE to 1. This is incompatible with the new default mode, so
+# we test for that and force the "-std=c89" compiler option:
AC_MSG_CHECKING([if we need to force back C standard to C89])
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([
CFLAGS="$CFLAGS -std=c89"
])
-# Checks for header files.
-AC_HEADER_STDC
-
-# Checks for typedefs, structures, and compiler characteristics.
-AC_C_CONST
-AC_TYPE_SIZE_T
+# Checks for structures and compiler characteristics.
AC_STRUCT_TM
AC_C_RESTRICT
# Checks for library functions.
-AC_FUNC_STRTOD
-AC_CHECK_FUNCS([pow], , AC_CHECK_LIB(m, pow, , AC_MSG_ERROR(cannot find pow)) )
+AC_CHECK_FUNCS([pow], ,
+ [AC_CHECK_LIB([m], [pow], , [AC_MSG_ERROR([cannot find pow])])])
-# Some later POSIX 1003.1 functions are required for test programs, failure here
-# is soft (the corresponding test program is not built).
-AC_CHECK_FUNC([clock_gettime],,[AC_MSG_WARN([not building timepng])])
+# Some later POSIX 1003.1 functions are required for test programs, failure
+# here is soft (the corresponding test program is not built).
+AC_CHECK_FUNC([clock_gettime], , [AC_MSG_WARN([not building timepng])])
AM_CONDITIONAL([HAVE_CLOCK_GETTIME], [test "$ac_cv_func_clock_gettime" = "yes"])
AC_ARG_WITH(zlib-prefix,
[prefix that may have been used in installed zlib]),
[ZPREFIX=${withval}],
[ZPREFIX='z_'])
-AC_CHECK_LIB(z, zlibVersion, ,
- AC_CHECK_LIB(z, ${ZPREFIX}zlibVersion, , AC_MSG_ERROR(zlib not installed)))
+AC_CHECK_LIB([z], [zlibVersion], ,
+ [AC_CHECK_LIB([z], [${ZPREFIX}zlibVersion], ,
+ [AC_MSG_ERROR([zlib not installed])])])
# The following is for pngvalid, to ensure it catches FP errors even on
# platforms that don't enable FP exceptions, the function appears in the math
AM_CONDITIONAL([DO_INSTALL_LIBPNG_CONFIG],
[test "$enable_unversioned_libpng_config" != "no"])
-# HOST SPECIFIC OPTIONS
+# HOST-SPECIFIC OPTIONS
# =====================
#
# DEFAULT
case "$host_cpu" in
arm*|aarch64*)
enable_arm_neon=yes
- AC_DEFINE([PNG_ARM_NEON_OPT], [0],
+ AC_DEFINE([PNG_ARM_NEON_OPT], [2],
[Enable ARM_NEON optimizations])
;;
mipsel*|mips64el*)
enable_mips_msa=yes
- AC_DEFINE([PNG_MIPS_MSA_OPT], [0],
+ AC_DEFINE([PNG_MIPS_MSA_OPT], [2],
[Enable MIPS_MSA optimizations])
;;
i?86|x86_64)
AC_DEFINE([PNG_ARM_NEON_OPT], [0],
[Disable ARM Neon optimizations])
# Prevent inclusion of the assembler files below:
- enable_arm_neon=no;;
+ enable_arm_neon=no ;;
check)
AC_DEFINE([PNG_ARM_NEON_CHECK_SUPPORTED], [],
[Check for ARM Neon support at run-time]);;
AC_MSG_ERROR([--enable-arm-neon=${enable_arm_neon}: invalid value])
esac])
-# Add ARM specific files to all builds where the host_cpu is arm ('arm*') or
-# where ARM optimizations were explicitly requested (this allows a fallback if a
-# future host CPU does not match 'arm*')
+# Add ARM-specific files to all builds where $host_cpu is arm ('arm*') or
+# where ARM optimizations were explicitly requested (this allows a fallback
+# if a future host CPU does not match 'arm*')
AM_CONDITIONAL([PNG_ARM_NEON],
[test "$enable_arm_neon" != 'no' &&
case "$host_cpu" in
- arm*|aarch64*) :;;
- *) test "$enable_arm_neon" != '';;
+ arm*|aarch64*) : ;;
+ *) test "$enable_arm_neon" != '' ;;
esac])
# MIPS
-# ===
+# ====
#
# MIPS MSA (SIMD) support.
AC_DEFINE([PNG_MIPS_MSA_OPT], [0],
[Disable MIPS MSA optimizations])
# Prevent inclusion of the assembler files below:
- enable_mips_msa=no;;
+ enable_mips_msa=no ;;
check)
AC_DEFINE([PNG_MIPS_MSA_CHECK_SUPPORTED], [],
[Check for MIPS MSA support at run-time]);;
AC_MSG_ERROR([--enable-mips-msa=${enable_mips_msa}: invalid value])
esac])
-# Add MIPS specific files to all builds where the host_cpu is mips ('mips*') or
-# where MIPS optimizations were explicitly requested (this allows a fallback if a
-# future host CPU does not match 'mips*')
+# Add MIPS-specific files to all builds where $host_cpu is mips ('mips*') or
+# where MIPS optimizations were explicitly requested (this allows a fallback
+# if a future host CPU does not match 'mips*')
AM_CONDITIONAL([PNG_MIPS_MSA],
[test "$enable_mips_msa" != 'no' &&
case "$host_cpu" in
- mipsel*|mips64el*) :;;
+ mipsel*|mips64el*) : ;;
esac])
# INTEL
AC_DEFINE([PNG_INTEL_SSE_OPT], [0],
[Disable Intel SSE optimizations])
# Prevent inclusion of the assembler files below:
- enable_intel_sse=no;;
+ enable_intel_sse=no ;;
yes|on)
AC_DEFINE([PNG_INTEL_SSE_OPT], [1],
[Enable Intel SSE optimizations]);;
AC_MSG_ERROR([--enable-intel-sse=${enable_intel_sse}: invalid value])
esac])
-# Add Intel specific files to all builds where the host_cpu is Intel ('x86*')
-# or where Intel optimizations were explicitly requested (this allows a
-# fallback if a future host CPU does not match 'x86*')
+# Add Intel-specific files to all builds where $host_cpu is Intel ('x86*') or
+# where Intel optimizations were explicitly requested (this allows a fallback
+# if a future host CPU does not match 'x86*')
AM_CONDITIONAL([PNG_INTEL_SSE],
[test "$enable_intel_sse" != 'no' &&
case "$host_cpu" in
- i?86|x86_64) :;;
- *) test "$enable_intel_sse" != '';;
+ i?86|x86_64) : ;;
+ *) test "$enable_intel_sse" != '' ;;
esac])
# PowerPC
-# ===
+# =======
#
# PowerPC VSX (SIMD) support.
# disable the default enabling on __ppc64__ systems:
AC_DEFINE([PNG_POWERPC_VSX_OPT], [0],
[Disable POWERPC VSX optimizations])
- # Prevent inclusion of the platform specific files below:
- enable_powerpc_vsx=no;;
+ # Prevent inclusion of the platform-specific files below:
+ enable_powerpc_vsx=no ;;
check)
AC_DEFINE([PNG_POWERPC_VSX_CHECK_SUPPORTED], [],
[Check for POWERPC VSX support at run-time])
[Enable POWERPC VSX optimizations])
AC_MSG_WARN([--enable-powerpc-vsx: please specify 'check' or 'api', if]
[you want the optimizations unconditionally pass '-maltivec -mvsx']
- [or '-mcpu=power8'to the compiler.]);;
+ [or '-mcpu=power8' to the compiler.]);;
*)
AC_MSG_ERROR([--enable-powerpc-vsx=${enable_powerpc_vsx}: invalid value])
esac])
-# Add PowerPC specific files to all builds where the host_cpu is powerpc('powerpc*') or
-# where POWERPC optimizations were explicitly requested (this allows a fallback if a
-# future host CPU does not match 'powerpc*')
+# Add PowerPC-specific files to all builds where $host_cpu is powerpc('powerpc*')
+# or where PowerPC optimizations were explicitly requested (this allows a fallback
+# if a future host CPU does not match 'powerpc*')
AM_CONDITIONAL([PNG_POWERPC_VSX],
[test "$enable_powerpc_vsx" != 'no' &&
case "$host_cpu" in
- powerpc*|ppc64*) :;;
+ powerpc*|ppc64*) : ;;
esac])
-
AC_MSG_NOTICE([[Extra options for compiler: $PNG_COPTS]])
# Config files, substituting as above
projects / platform / upstream / libpng.git / blobdiff