This report pertains to release 3.1.1 of libjpeg-turbo. I haven't (yet)
tried out any older releases.
As you are no doubt aware, Cygwin provides a POSIX-like emulation layer as
well as Gnu developer tools, on Microsoft Windows. I'm running Cygwin
version 3.6.3-1.x86_64 on Windows 11.
When running cmake to create the build infrastructure, I hit this error:
CMake Error at CMakeLists.txt:107 (math):
math cannot parse the expression: " * 8": syntax error, unexpected
exp_TIMES (2).
The entire output is included below, for context. I am hoping someone can
take a look at this and provide a fix that lets it configure on Cygwin. If
that can't happen right away, I'd welcome just a reply from anyone who's
built libjpeg-turbo on Cygwin in the past. BTW, I configured and built from
exactly the same source kit on Debian Gnu/Linux, and as you'd expect, all
went smoothly.
Thank you, Soren
---
cmake -G"Unix Makefiles" -DCMAKE_INSTALL_PREFIX=/usr/local/libjpeg-turbo
-DCMAKE_INSTALL_BINDIR=/usr/local/bin
-DCMAKE_INSTALL_DOCDIR=/usr/local/share/doc
/cygdrive/C/Users/somia/Downloads/libjpeg-turbo-3.1.1/
-- CMAKE_BUILD_TYPE = Release
-- VERSION = 3.1.1, BUILD = 20250719
CMake Error at CMakeLists.txt:107 (math):
math cannot parse the expression: " * 8": syntax error, unexpected
exp_TIMES (2).
-- ERROR-bit build (i386)
-- CMAKE_INSTALL_PREFIX = /usr/local/libjpeg-turbo
-- CMAKE_INSTALL_BINDIR = /usr/local/bin
-- CMAKE_INSTALL_DATAROOTDIR = share (/usr/local/libjpeg-turbo/share)
-- CMAKE_INSTALL_DOCDIR = /usr/local/share/doc
-- CMAKE_INSTALL_INCLUDEDIR = include (/usr/local/libjpeg-turbo/include)
-- CMAKE_INSTALL_LIBDIR = lib (/usr/local/libjpeg-turbo/lib)
-- CMAKE_INSTALL_MANDIR = share/man (/usr/local/libjpeg-turbo/share/man)
-- Shared libraries enabled (ENABLE_SHARED = 1)
-- Static libraries enabled (ENABLE_STATIC = 1)
-- Arithmetic decoding support enabled (WITH_ARITH_DEC = 1)
-- Arithmetic encoding support enabled (WITH_ARITH_ENC = 1)
-- TurboJPEG API library enabled (WITH_TURBOJPEG = 1)
-- TurboJPEG Java wrapper disabled (WITH_JAVA = 0)
-- Emulating libjpeg API/ABI v6.2 (WITH_JPEG7 = 0, WITH_JPEG8 = 0)
-- libjpeg API shared library version = 62.4.0
-- Compiler flags = -O3 -DNDEBUG
-- Linker flags = -Wl,--enable-auto-import
-- HIDDEN = __attribute__((visibility("hidden")))
-- INLINE = __inline__ __attribute__((always_inline)) (FORCE_INLINE = 1)
-- THREAD_LOCAL = __thread
-- Linker supports GNU-style version scripts
-- CMAKE_EXECUTABLE_SUFFIX = .exe
-- CMAKE_ASM_NASM_COMPILER = /usr/bin/nasm.exe
-- CMAKE_ASM_NASM_OBJECT_FORMAT = win32
-- CMAKE_ASM_NASM_FLAGS = -DWIN32 -DPIC
-- SIMD extensions: i386 (WITH_SIMD = 1)
-- FLOATTEST8 = sse
-- FLOATTEST12 =
-- Configuring incomplete, errors occurred!
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